Bluesky has some good content if you curate your feeds and algorithm (it's fully customisable). Also spend a lot of time on Twitter but I don't recommend it.
Reddit can be okay if you choose the right niche subreddits -- stay away from the main page subreddits. Among the niche subreddits, I find location-based subreddits and subreddits for podcasts to be good sources for unique communities.
I've been seeing more AI slop being posted on reddit even on smaller subreddits. Whatever people are using to do it likes to somewhat randomly bold certain words to emphasize them so it stands out a bit once you notice it.
It's always wild to me that anyone actually uses reddit by looking at the front page or r/all or whatever. For years when I would go to reddit.com I was like "why is this even a thing". It's only once I found a few small subreddits that I found anything useful there. Most of it is a firehose of garbage.
Reddit can be okay if you choose the right niche subreddits -- stay away from the main page subreddits. Among the niche subreddits, I find location-based subreddits and subreddits for podcasts to be good sources for unique communities.