You can't be serious.
I don't use neither X nor bluesky, but I did get an X account for a while so I could check the links in random news or conversations, and half the posts had unrelated Nazi messages just below.
Not 'oh that's right wing so he's a Nazi' comments, I mean literal swastikas and kkk uniforms.
That's been my experience, too. I signed up with an account so I could follow some people, and my default timeline has been full of some pretty extreme stuff.
For example, there were a shocking number of posts against the proposed digital ID system because it's being advocated for by "Larry Ellison, a Jew". That's a verbatim quote, BTW. Uh, excuse me? There are plenty of valid reasons to dislike Larry Ellison, but his supposedly being Jewish is 100% not one of them. But there it was, up front and proud: oppose this thing because Jews are pushing for it!
That was one example of a great many loathsome things I saw there, and before anyone asks, no, I didn't see any leftwing equivalent content. Not saying it's not on there, just that it was not on my default timeline.
Yup, that’s the kind of thing I was talking about.
Curiously I was immediately downvoted, which (assuming most people here aren’t that extreme) makes me think people relatively into the network aren’t familiar with the current state for a newish user.
I was shocked at what I saw. I won't so far as to say that I wouldn't have believed you, but I would've been skeptical. Nope, not anymore. It was really, really bad. And like you, I'm not talking about things like "oh no, people are saying things I disagree with!" It was more like "wow, I cannot believe people are actually saying these things in public without fear of being shunned by society".