I can't decide whether I'd be classified as an anti-hero or an anti-villain tbh. I definitely do not have the moral compunctions that bind heroes into being goody-two-shoes types. If I had some kind of super power I would absolutely destroy people who stand in my way, not just beat 'em up and foil their plans before sending them to jail. I'd have some kind of ultimately good intention insofar as I see it, but of course that would be up for interpretation and many other people who are out to do good in the world would see me as a bad guy. Also all the killing people and destroying things would get me classified as a bad guy by most, so there's that.
Given those facts, my antagonists would be a wide mix of foes: knight-in-shining-armor type heroes, true villains who get in the way of my plans, and people out to avenge people who died or got severely injured by my actions. Assuming good storytelling was in play, there would be at least a couple interesting and recurring antagonists from each camp who work as great foils to various parts of my own dynamic. The heroes would call into question the end goal and the methods while acting as living examples of purely good alternatives, the villains would challenge the whole notion that I am in any way good after doing things just as bad as or worse than any of them, and the vengeance seekers would keep the high costs of my chosen course of action in focus and act as a sort of karmic balance.
I think it'd end up being a story where the major/recurring antagonists are just as complex and interesting as the protagonist, sometimes stealing the show and often having the audience agree with their arguments and such.