If you're on the right you think he's a Marxist commie, and don't like commies.
If you're a commie you don't think he's a commie, you think he's full of shit and uses left wing intellectual language to hide that he's an apologist for liberal social democracy, but in a bad way where social democracy is a step toward capitalization and away from revolutionary socialism.
If you're an anarchist probably think he's an avatar for a certain kind of former Soviet bloc intellectualist elitism, and he actively discourages direct action (I've never spoken to an anarchist about him, I might have to ask one.)
Gender critics and feminists don't like him because he's more than a little chauvinistic, and a vocal critic of Judith Butler.
If you're apolitical you think he's annoying and incomprehensible.
I think he appeals to a certain sort of budding or wannabe left intellectual. Someone who doesn't completely understand his work as a decades-long project, probably because they are still discovering it, and the political consequences of that project. Like he says things that are interesting and sort of novel because he's a Hegelian and Hegelian analysis can be full of all kinds of cool insights. When you assemble his arguments together as a body of work though it has a much different character than some of his more interesting points in isolation. But as a moderate Hegelian he neither fits with the right "end of history" Fukuyamist Hegelians or the left Marxist Hegelians, and he is critical of both groups.
I think he understands intellectualism as a social force, and likes to bother different stripes of intellectuals. He's controversial enough to stay relevant, and good at working the media. I think he is very intentional with all this stuff.
But he broke Jordan Peterson when they debated, and got him out of the spotlight for like a year or two and that was pretty funny
As long as he is alive he can be propped against a podium to say racist, upsetting shit, then Stephen Miller and more clandestine moneyed interests like David Koch and Peter Theil pull the strings of the party and movement. Its probably better for operators heavily invested in Trump if he's less intellectually competent.