I’ve found the same thing. Twitter was great for very specific, topic-based communities with everything else filtered out. The only reason I used it heavily was because of a couple of small, insulated scenes.

My Mastadon instance is just an insufferably banal stream of tweeters who are united in their fear of posting anything interesting enough to be offensive. It’s basically “nice twitter”, which still sucks balls anyway if you don’t have a scene to keep in touch with.

Lemmy is very much “nice reddit” for now and I’m finding it far more enjoyable to use.