I found in recent years the quality was hit by spammers who were basically regurgitating content from other social media sites and spamming it to whatever subs would allow. Even though they'd get banned they'd have like a dozen alts, all co-mods on the same subreddits, and just make new accounts to get around it. You'd report them for ban evasion and nothing would happen. It would be political spam too, like you'd have accounts posting to "antifascist" subs and red pill subs just so they could cover all the bases.

Speaking of quality, it basically became the things your parents like on Facebook or Google Image results for "epic internet meme." Political humor was reduced to AI images of angry Trump looking damp with captions like "oh no I'm going to jail." For niche-interest subs it basically becomes people posting pictures of boxes of products they bought or asking which products to buy, people getting angry and debating about products and people who sell products.

Case in point that Oliver guy who would sell his books and shit on his subreddits and respond to every comment with links to his own blog posts, sold anti-Trump merch that hilariously looked like it was pro-Trump, posted ACAB stuff but also made racist copaganda comics, pretended to be an enlightened leftist but also wrote a red pill book about how rape is natural. Guy got banned for harassing mods of other subs and got his network of 20+ spam subreddits and dozens of alts banned, but the admins don't do anything when they try and rebuild their spam network.