Here's one incident, two years ago, shortly after Musk acquired X:
"Twitter Suspends Reporters From WashPost, NYT, Others Who Wrote About Elon Musk," HuffPost, Dec 15, 2022
https://www.huffpost.com/entry/tech-journalists-suspended-twitter_n_639bc62ee4b0f4895ad9ed9e
An account called "ElonJet" followed the location of Musk's jet. He suspended that account. He then suspended the accounts of journalists who reported the fact that he had suspended the ElonJet account. Revealing the unseriousness of his own approach, he then "shared a poll asking his 121 million followers if the [journalists'] accounts should be unsuspended immediately or after a seven-day ban." Evidently the journalists posed no threat to his own safety (or he would have suspended them permanently). He was just making a game out of his power to suspend them.
Anyway, when I was on Twitter, I saw a lot of hateful messages that I reported. Many of these reported messages — particularly after Musk acquired the platform — were not removed. For example, accounts with hate symbols (including swastikas) as their profile pictures, explicitly praising Hitler and saying there should be fewer Jews, and a lot of anti-Black racism too. The day I launched my novel, an anonymous account replied to allege that my novel (which obviously they had not read) endorsed a specific gruesome form of violence against children (my novel is about friendships between adults). That person or bot was targeting me because of my identity. These posts were obviously hateful, yet they were not removed for violating rules against hate.
Famously, Musk also decreed that the word "cisgender" (meaning "not transgender") is a slur against people who are not trans. It isn't: Many people who aren't trans call themselves "cis." It was 15 years ago that one of my friends introduced herself to me as a "cis woman," so this is not new. The word tends to signal an acceptance that some people are trans, so it's a neutral way to say "of course it would be fine if I were trans, but it so happens that I'm not." Musk declared it a slur just to silence trans-inclusive people from having trans-inclusive conversations. A normal conversation like "Hi, I'm cis and my partner's trans" is considered "hateful content" on X. I know someone whose X post, only three days ago, was marked as "hateful conduct" because it referred to Rep. Matt Gaetz as "hetero cisgender"; the post simply observed that Matt Gaetz is straight and not-trans and that the Republicans have double standards for people who are gay or trans. Maybe that's a "political" view, but it's one that people should be allowed to express. If you search Medium for the phrase "cis is a slur," you'll find a bunch of commentary from Medium members about this X policy.
Elon Musk has a political standpoint. He is literally joining the Trump administration. He makes the rules on X, and he decides how to apply them. He applies them in a biased way for political purposes. He lets outright swastika-waving Neo-Nazis post on his platform while he bans trans-inclusive language. "Hateful" is not an objective term on X; it's a label with which Musk shuts down speech he doesn't like. If he doesn't approve of you, he'll suspend your account, make up a fake reason, and treat it like a joke.