My experience with Reddit is that it still mostly depends on the subreddit. Big subreddits like Ask Reddit or Politics or Technology? Probably a lot of bots and shills, with an equally large amount of low quality content from people that didn't bother to read the article or anything related to it.

Smaller niche ones for games and series? Eh, it's definitely worse in terms of quality, though my experience is that it still seems mostly human driven. The last subreddit I used was the one for the Mario & Luigi series for example, and it seems pretty legit as far as posts go.

But yeah, my opinion is that the quality has certainly taken a nosedive overall, and the amount of posts per day has fallen in many places, but the quality of more niche subreddits is still decent enough compared to majority of social media sites.