I lurked multiple ends of the site for a week or so while I was in High School, and let me be frank, there's a point where Satire gets horribly boring and expected. Despite that, far, far too many users on there find a need to spread that satire all over the internet without a context with which to make it funny or remotely featuring the parody the site itself tries to establish, making them into pretty much exactly what they're trying to mock in many situations.
Of course, not everything there is bad, but just watch a "Twitch Raid compilation" and tell me how often they're doing something that's not at least partly a federal offense for the sake of 'comedy.' The Joker is a cool villain, but that doesn't mean we need droves of people imitating him because someone found it funny and/or entertaining. Even when it's not criminal, it's all the same stuff repeated in different ways, and often in the least clever of fashions (i.e. trolling little kids, including those conforming to general age standards).
As for yet another thing that annoys me, people who feel entitled to others' affections. Also known as people whining about the "friendzone."