The Purported verses Go as follows-
Padma Purana, Uttara, 236 (Lord Shiva Speaks to Mata Paravati)
māyāvādamasacchāstraṁ pracchannaṁ baddha ucyate mayaiva kathitaṁ devi
kalau brāhmaṇarūpiṇā 7
apārthaṁ śrutivākyānāṁ darśayanlokagarhitam svakarmmarūpaṁ
tyājyatvamatraiva pratipādyate 8
sarvakarmmaparibhraṣṭairvaidharmmatvaṁ taducyate pareśajīvapāraikyaṁ
mayā tu pratipādyate 9
brahmaṇosya svayaṁ rūpaṁ nirguṇaṁ vakṣyate mayā sarvasya jagato
‘pyatra mohanārthaṁ kalau yuge 10
vedārthavanmahāśāstraṁ māyayā yadavaidikam mayaiva kalpitaṁ devi
jagatāṁ nāśakāraṇāt 11
The doctrine of Māya (illusion) is a wicked doctrine and said to be
pseudo-Buddhist. I myself, of the form of a brāhmaṇa, proclaimed it in
Kali (age). It shows the meaninglessness of the words of the holy
texts and is condemned in the world. In this (doctrine) only the
giving up of one’s own duties is expounded. And that is said to be
religiousness by those who have fallen from all duties. I have
propounded the identity of the Highest Lord and the (individual) soul.
I stated this Brahman’s nature to be qualityless. O goddess, I myself
have conceived, for the destruction of the worlds, and for deluding
the world in this Kali age, the great doctrine resembling the purport
of the Vedas, (but) non-Vedic due to the principle of Māya (illusion)
(present in it).
Actually, The Above verses, if held as true would be A denigration of Veda Vyasa's own teachings in the puranic corpus.
To begin with, the above is contradicted by these statements from the other puranas-
श्रौतस्मार्त्तप्रतिष्ठार्थं भक्तानां हितकाम्यया । उपदेक्ष्यति
तज्ज्ञानं शिष्याणां ब्रह्मसंज्ञितम् । सर्ववेदान्तसारं हि धर्मान्
वेदनिदर्शितान् ।। सर्ववर्णान् समुद्धिश्य स्वधर्मा ये निदर्शिताः।
Nilalohita Siva , For the establishment of Srauta(Vedic) and Smarta
dharmas and for the welfare of devotees shall incarnate on earth.He
will enlighten his his devotees on the gist of Vedanta,and the dharma
related in vedas.
(कूर्म पुराण 30/34-35)
Which says the purported incarnation of Shiva would incarnate to elighten people on vaidika dharma and not delude them.
At the same time, There are several verses across the puranas which declare the world to be mAyA, and endorse Brama - atama -aikyam. Of course, One might have one's own interpretation of these concepts and that is how we have so many schools of thought, each vehemently condemning the other and holding one's own as the çorrect . Here is one such, from the srImadbhAgavatapurANam:-
यदिदं मनसा वाचा चक्षुर्भ्यां श्रवणादिभिः । नश्वरं गृह्यमाणं च विद्धि
मायामनोमयम् ।। ११-७-७ ।।
Whatever is perceived by mind, speech, eyes, ears (and other cognitive
and congitive senses), know that it is a product of Māyā and manomaya
(product of the mind).
~ Bhagavatam 11.7.7
श्रीधर-स्वामि-टीका -
ननु गुणदोषाभ्यां विषमे लोके कुतः समदृष्टिः स्यामत आह – यदिदमिति । मन आदिभिर्गृह्यमाणं मनोमयत्वान्मायेति विद्धि । तदपि न स्थिरं, किंतु नश्वरं विद्धि ।। ७ ।।
Here is the declaration of Brahmatmaikyam in the same puranam.
सर्ववेदान्तसारं यद् ब्रह्मात्मैकत्वलक्षणम् । वस्तु अद्वितीयं तन्निष्ठं
कैवल्यैकप्रयोजनम् ॥ १२ ॥
The Bhagavata's main theme is the quintessence of all the Upaniṣads (which form the last division of the Vedic texts) which is
characterised by (the declaration of) complete one-ness, identity
between the absolute Brahman and the ātman. It is one
without a second. And its only object is to secure Mokṣa.
~ Bhagavatam 12.13.12
आत्मनश्च परस्यापि यः करोत्यन्तरोदरम् । तस्य भिन्नदृशो मृत्युः विदधे
भयमुल्बणम् ॥ २६ ॥
If a person makes even a slight difference between himself and the
Supreme Self (Paramātman), I, who am Death, create a big fear for him
who entertains the idea of difference.
~ Bhagavatam 3.29.26
Repeated From the very padmapurana itself.
मन्यंते ये स्वमात्मानं विभिन्नं परमेश्वरात् । न ते पश्यंति तं देवं
वृथा तेषां परिश्रमः ३८।
Those who consider themselves as different from Parameshwara do not
realize the Truth; their effort is a waste.
~ Padmapurana , Svargakhanda, Ch 60
So, here is another 'self-contradiction' across VyAsa's own works, vyAsa declaring his own work as mAyAvadam and that it is ásacchAstram'' And one can point out verses from puranas of vyAsa himself which teach 'jivaparyoraikyam', etc. stated above. And one can argue that such verses are not of that meaning etc. And eternally go on such debates..
Here is a sample of citations of Puranas themselves Giving out the unambiguous teaching of Advaita at several places where it is taught as a valid path to liberation.
आत्मज्ञानं प्रवक्ष्यामि शृणु नारद तत्त्वतः । अद्वैतं
साङ्ख्यमित्याहुर्योगस्तत्रैकचित्तता ॥ १,२३६.१ ॥ अद्वैतयोगसम्पन्नास्ते
मुच्यन्तेऽतिबन्धनात् । अतीतारब्धमागामि कर्म नश्यति बोधतः ॥ १,२३६.२ ॥
Hear from me the discourse on Atma Gyana. There are two kinds of yogas
i.e. Advaita Yoga and the Samkhya Yoga.Practisers of Advaita-Yoga
become free from the Shackles of existence. Past, present and future
karma is destroyed through knowledge
~ Garuda Purana I.236.1-2
From the Vishnudharma purana
अद्वैतं परमार्थो हि (०९६-०१९)
द्वैतं तद्भेद उच्यते (०९६-०१९)
Advaita is Paramartha Tattva (Absolute Reality), Dvaita (Duality) is
not Paramartha.
यश्च द्वैते प्रपञ्चः स्यान् (०९६-०२४)
निवर्त्योभयचेतसः (०९६-०२४)
The cognition of the dualistic world ends with the Abhaya Buddhi,
realization of the Fearless Brahman. (In this is hidden the
Upanishadic saying ‘Dvitiiyaad vai Bhayam Bhavati’)
मनोवृत्तिमयं द्वैतम् (०९६-०२४)
अद्वैतं परमार्थतः (०९६-०२४)
Dvaita, difference, is a mental construct. Advaita is the
transcendental truth.
यावत्स्याद्गुणवैषम्यं तावन्नानात्वमात्मनः नानात्वमात्मनो
यावत्पारतन्त्र्यं तदैव हि ३२
So long as the unbalanced condition of guṇas prevails, manifoldness
(and difference) will be projected on Ātman (which, as a matter of
fact, is one). As long as the (apparent) multiplicity in the Soul
remains, the state of dependence (of the Jīva) shall persist.
~ Bhagavatam 11.10.32
Garudapurana-
ब्रह्मात्मनोर्यदैकत्वं स योगश्चोत्तमोत्तमः । बाह्यरूपैर्न मुक्तिस्तु
चान्तस्थैः स्याद्यमादिभिः ॥ १,२३५.५३ ॥
ब्रह्मात्मनोर्यदैकत्वं स योगश्चोत्तमोत्तमः । बाह्यरूपैर्न मुक्तिस्तु
चान्तस्थैः स्याद्यमादिभिः ॥ १,२३५.५३ ॥
The Yoga that establishes non-difference of Brahman and Atman is the
greatest yoga.
~ Garudapurana I.235.53
The non-difference of Brahman and Atman is the greatest yoga.
Furthermore, the purprted padmapura verses allege-
कर्मस्वरूपत्याज्यत्वमत्रैव प्रतिपाद्यते॥ ६-२३६-८ ॥
सर्वकर्मपरिभ्रष्टैर्वैधर्मत्वं तदुच्यते।
In Mayavada (Advaita) alone the giving up of karma by their very
nature is taught.
One can easily see how this is a denigration of what Krishna has said in the Bhagavatam.
तस्मात्त्वमुद्धवोत्सृज्य चोदनां प्रतिचोदनाम्। प्रवृत्तिं च निवृत्तिं च
श्रोतव्यं श्रुतमेव च १४। मामेकमेव शरणमात्मानं सर्वदेहिनाम्। याहि
सर्वात्मभावेन मया स्या ह्यकुतोभयः १५।
14-15. Hence, O Uddhava, (transcending everything) ignore Vedic
injunctions and prohibitions, renounce both Pravṛtti and Nivṛtti types
of karmas, and give up what is learnt and what is to be learnt. With
exclusive devotion to me seek shelter in me only who am the Soul of
all embodied beings. Protected by me, you will have no fear from any
quarter i.e.. you will attain Mokṣa)
~ Bhagavatam 11.12.14-15
So, the Lord himself is asking Uddhava to give up enjoined work. This is nothing short of Sarva karma sannyasa. The purport of the Bh.Gita famous verse: sarva dharmaan parityajya.. is echoed here. The commentary of Sridhara Swamin is below:
यस्मादेवंभूतो मद्भजनप्रभावः तस्मात् त्वं चोदनाम् = श्रुतिं, प्रतिचोदनाम् = स्मृतिं च | यद्वा विधिं च निषेधं च उत्सृज्य मां शरणं याहि |
[Since such is the power of being devoted to Me, Uddhava, give up the veda and smriti. Or, having given up the injunctions and prohibitions take total refuge in Me.]
Thus while Veda Vyasa himself has taught the giving up of karma the Padmapurana allegation on Advaita is quite preposterous.
As far as Advaita being pseudo buddhism is concerned, An interesting counterpoint can be found in the work मध्यमकहृदयम् by भव्यः, a माध्यमक-बौद्धः (a pre शङ्करः), Prof V.V. Gokhale in a paper titled "The Vedanta Philosophy described by bhavyaḥ in his मध्यमकहृदयम्" (Indo-Iranian Journal, Vol. 2, No. 3, 1958) presents a description of vedānta (pre-Śaṅkaraḥ) that was available during bhavya's time. He also refers to a situation where the mahāyānam school is criticised as being similar to vēdāntaḥ. In reply, bhavyaḥ generously says that whatever is good in the vedanta has also been taught by the buddha.
In one of the chapters of the मध्यमकहृदयम् dealing with the hīnayāna’s objections to mahāyānam, the hīnayāna-buddhist criticises the mahāyāna Buddhist saying:
न बुद्धोक्तिर्महायानं सूत्रान्तादावसङ्ग्रहात्। मार्गान्तरोपदेषात् वा
यथा वेदान्तदर्शनम्॥
The māhāyāna teaching was not spoken of by the buddha, either because
it is not included in the sūtrāntas, or because like the
vedānta-darshanam, it teaches heretic paths to salvation.
To this attack, the mahāyānist replies:
वेदान्ते च हि यत् सूक्तं तत् सर्वं बुद्धभाषितम्। दृष्टान्तन्यूनता
तस्मात् सन्दिग्धं वा परीक्ष्यताम्॥
Whatever is well said in the vedānta has been taught by the buddha.
The various examples cited by the hīnayānam are faulty and what is
doubtful must be examined.
Here is an example of pre-Śaṅkaran Buddhist work where the opponent criticises the mahāyāna buddhist school itself as being similar to vedānta! The reply of the mahāyāna buddhist is even more remarkable - there is a concession that the best elements of the upaniṣads have been taught by the Buddha himself.
In the Following work, Śrīla Bhaktivinoda Ṭhākura, A renowned purvacharya of the Chaitanya vaishnavite school, despite being an Avid critic of the Advaita philosophy states - Adi Shankara followed the siddhanta of the likes of Dattatreya, Ashtavakra, Durvasas and other maharsis.

Source :- Sriman Mahaprabhura Siksa, By Bhaktivinoda Thakura, Chapter 9
Here, We have someone even from one of the Rival schools of Advaita who accepts that Shankara did not 'concoct' a new system of philosophy like what is being alleged in the above verses.
Based on the above two conclusions can easily be drawn.
Advaita as a philosophy far pre-exists Shankaracharya, so the claim of it being created solely for deluding the people of kaliyuga becomes invalid.
If Advaita is held as wrong and pseudo buddhist, one would have to hold the gyana-margi maharsis such as dattatreya,durvasa etc. were pseudo-buddhist as well