Probably mailday posts. Which some people do hate. The problem is that people who like the discussiony posts (or even mailday) have to coexist with the people who like trick posts… and the “winner takes all” voting homepage format of Reddit means, like highlander
so fighting is inevitable. And to be honest? The goofy memes will ALWAYS win in the long run because they are the least effort, highest reward content. The only way to change that is extreme moderator intervention, which to be fair does exist on some subreddits.
(It’s funny because you always hear people complaining about how bad things are with overly strict moderation, but the reality is that there are far FAR FAR more problems in the actual real world with lack of moderation.)