I know what Mastodon is. What you say is true for every social network, you can find your little niche that works for you. I'm speaking in broad terms about the general culture.
It's not true for Twitter, which uses it's algorithm to force high-engagement outrage into your feed
Are you saying that the average user of any Mastodon server is “evil and disturbed?”
It’s kind of like Reddit. There’s all kinds of slimy subreddits, but I just don’t join those and I never see their content or discourse.