I'm increasingly unsure if this is something to aspire for. I make an effort to only follow people I know, and I turn off algorithmic feeds on social media, but it doesn't matter because the people I know routinely reshare made-up political bait and AI slop that's coming from the broader ecosystem.

This sucks and there's no way to push back on that. First, if you do it too much, you're just a "reply guy" - you become a part of the same suckiness of social media that you're trying to push back against. Second, the near-universal reaction you get is "maybe these specific immigrants were not eating pets, but you gotta agree with my broader concern about immigration". This just an example, the reaction has its equivalent for all sides of the political spectrum. We just like to read stuff that aligns with our political identity and beliefs. The pursuit of truth is a distant second.

I think that for social networks or forums to be at least somewhat healthy, they need to be small, specifically to limit the interactions you have with complete strangers and content that doesn't interest you at all. If you open up the ecosystem too much, it devolves into some flavor of Facebook.

Yeah, I agree that small social networks are better. But some people are just bad at using social media - even if they're great people in other ways, so they share AI slop and made up political bait posts. You may have to curate your feed a bit.