My two cents: If you believe your time is honestly best spent elsewhere, you should at first absolutely excel at what he has you doing in this moment. At that point you can discuss moving into something more interesting.
I've known plenty of managerial staff who examine their employees, and out of everyone who does task A through E well enough, from the pool there are workers who do each task slightly better than others. They get assigned to that task constantly, even if it's not in an area they would normally enjoy. From there, two groups of people pop up: (1) people who excel at their assigned role and take on side projects, and (2) people who do average in their assigned role but give more effort on side projects. People from group 1 normally get the better chance of transitioning to something they would prefer doing within the company. People who're giving a mediocre effort at their assigned task aren't going to garner any freedoms, and they're certainly not going to be thrown into a more complex task.
Some side projects due to complexity will garner you some reputation with managers, but more often than not I think it would be more beneficial to excel at what they assign you before asking for more.
In some cases you will have a genuinely bad boss, too, and I think to some extent what to do about bad bosses has been answered time and again on this site. But, I've also seen people wrongly perceive what are objectively normal interactions between boss and subordinate as disrespect from one or the other. If you can't simply drop the job, at the very least be the guy who's always good for what is assigned, and if you eventually leave it'll be with a positive reference and another section on your resume.
TL;DR Do whatever you're assigned really well, and then go on to ask for something more. I'd also recommend having a rational discussion with this boss about your expectations for your work, what you can do, and what he has you doing as it doesnt seem from your question that you've talked to your boss about this problem.