I used to feel that way on Mastodon myself! Being immersed in mundane content felt more like Facebook w/strangers (kind strangers, at least!) instead of what I’d want from a Twitter alternative (fluid breaking news discussions, humour, even “viral” content). What helped me is aggressively following hashtags and users who post stuff I care about, cuz the Mastodon experience relies heavily on follows compared to Twitter — now my feeds are much more active and focused on stuff I care about.
It isn’t perfect though, and there’s much I miss about Twitter’s content/follow recommendation system. Like obviously we shouldn’t repeat the ultra-unethical aspects of that system (privileging “angertainment,” conflict, false information, hate content, etc). But I wish its good aspects (ease of finding other users who discuss what you like, democratizing who gets a “voice” in public discourse, allowing users to directly confront public figures/institutions when needed, etc) could be replicated on Mastodon somehow.
I feel like much of Reddit has the same problem to varying degrees depending on the sub (saw it all the time on r/Android and r/Apple, but didn’t see it at all on smaller/chiller subs like r/Tamagotchi). I don’t like seeing it on Lemmy either though, it’s not something the community or platform should positively reinforce