So, the subreddit I mod basically uses its rules to tell people not to throw insults at each other, to avoid low-effort types of posts (like memes) and to stay on-topic.

That's not terribly difficult to follow. But it still ends up taking a lot of words to express, largely because so many people will come in with an attitude of "well my post is special and shouldn't have to be subject to that". Plus, of course, lots of people are just assholes on the internet.

We use AutoModerator to catch what it can catch. We manually remove a lot of other stuff. We use short temporary bans for some categories of rule-breaking, and permanent bans for assholes.

And it mostly chugs along, which is about the best you can hope for most of the time as a moderator. But, again, there's not time to hold the hand of people who think reading a short set of rules is beneath them, or who otherwise have aggressive attitudes to begin with (like you!). And even if there was, it wouldn't be worth the time. If we added a hundred million new moderators overnight just to try to do this, it wouldn't improve things one bit.