A solution is creating more niche subs, As an example the main Star Trek sub is very relax, so you get a variety of posts there and the comments vary in quality

A solution is creating more niche subs, As an example the main Star Trek sub is very relax, so you get a variety of posts there and the comments vary in quality from very informed ones to just memes , hare and entitlement. So there are sister sub-reddits , I like r/DaystromInstitute because if has a narrow scope and the moderation is strong no lazy comments allowed. There are subreddits for each Star Trek series(even the old one get hate and low effort meme comments) so you can discuss your favorite show and keep out the hate and meme comments. IMO this is the best thing, I seen it in gaming too, because fans will not agree which version of the game is good and which one is trash so they make smaller sub-reddits to talk in peace. Though you need someone to kickstart things and force moderation, then the community grows a bit and it can self moderate.