May I ask what instance you were on? A lot of guides don't talk about it, but there is a dark version of Fediverse, often references as the "freeze peach" instances.

They are generally blocked by most mainstream instances, but enough are open so that you can't still follow a majority of the mainstream content from these instances.

However, when you are on them, the content is very much like how you describe it. That's why I'm curious as to whether you (possibly accidentally) joined the one if those. If you you di, and you're not actively looking for such content, the experience can be quite terrible.