He literally said in this tweet thread that every one of these social media sites starts out being "pro free-speech" and learns how impossible that actually is to live up to.
Reddit is "really, really racist, sexist, and authoritarian" because there's literally no other way to be a major social media site. It's all shitty and horrible, and there's absolutely nothing you can do about it. That's exactly what the thing we're all commenting on is trying to say, that Elon thinks he can fix this but he can't, and it will cost Elon and the world a substantial amount.
Everything you named still is far worse with how much they allow and how much bigotry, .1% worship, and far more authoritarian ideology than Twitter. By a wide margin.
Reddit is "really, really racist, sexist, and authoritarian" because there's literally no other way to be a major social media site. It's all shitty and horrible, and there's absolutely nothing you can do about it. That's exactly what the thing we're all commenting on is trying to say, that Elon thinks he can fix this but he can't, and it will cost Elon and the world a substantial amount.