People suck, especially Reddit moderators. They've been destroying communities for years. Honestly, the best thing Reddit could do is figure out how to shake these people off like a bad case of fleas. Maybe that is what they're doing?

You're 100% right - people want communities where the posts are largely relevant. Has AI advanced enough to make AI moderation possible? Can upvoting/downvoting posts help train an AI what a community values and what it doesn't? That's where I think things are eventually headed.