SpaceX

People dislike him for a lot of different reasons. One has been his disregard for workers' rights and safety. Another is his twitter posts/retweets/memes that put down or spread misinfo about different disadvantaged groups or minorities. His political views are... what you'd expect for someone who posts that, which most people aren't cool with. His influence over Starlink and terminals not working for the Ukrainian army in Crimea was a mess. When those kids were trapped in an underwater cave and some divers decided not to use his improvised mini-sub, he called one a pedo. He has had sexual harassment allegations. Etc etc.

Basically, he went from the quirky awkward rich guy making cars and rockets to a really annoying public figure with too much influence, some rough opinions, and no one telling him no.

(I'm a SpaceX fan and wish he would delete all social media, shut up, and focus. You know, like most CEOs of giant companies.)