To begin with, I think if the show lacked Jar Jar, it would seem off. I actually found it strange how many political episodes lacked Jar Jar, considering that in the movies he is always seen in the Naboo senatorial pod. Yes, Jar Jar was not extremely popular when the movies first came out, but the same could be said of practically every other character in the Prequels, save perhaps Obi-wan. If anything, with such a major character in The Phantom Menace, I think he should have been in it more. Since then, there are two or three characters who have almost undoubtedly landed in the territory of being less popular than Jar Jar—Rose Tico, Admiral Holdo, and (arguably) Rey "Skywalker". But certainly, in the case of Rose Tico, many objected to how absent she was from Episode IX. They probably wanted her improved. Since The Clone Wars made almost every character better from the Prequels, I don't see why Jar Jar should not receive the same courtesy of being more fleshed out—and fleshed out he was, between showing himself to be very experienced with nature, taming a giant slug, negotiating with General Grievous, and becoming Indiana Jones for one episode.
But really, I think the idea that he is "almost universally hated by audiences" is something of a myth, brought on more by a fad of what is popular to believe. Yes, some people actually do not like Jar Jar and they are free to (though I suspect most of them are the types who are not too keen on the droids either), but I get the impression that the fad came on from people quoting the media (back before social media was big) and therefore the vocal minority became the majority. Also, I suspect some of the older fans may have just been resistant because he was new and unexpected, since I find most newcomers to the Star Wars universe do not have much of an antipathy toward him.
If you want to see how people actually feel about Jar Jar, go out and ask real Star Wars fans, particularly those under the age of twenty-five. I suspect you will find a mixture of ambivalence and absolute love for the character. And if you need proof, just watch this.