People trying to get upvotes in art subs by adding in the fact that they are a tween and/or it took them several hours to complete when both aspects are questionable
The amount of snarky, smug and sarcastic comments.
Top comments on big subreddits are either a bad pun/joke or a popular movie/TV show reference.
Too often, if you have a different opinion you just get downvoted to hell for it, abused in the replies or straight up banned from the subreddit.
The search bar is useless