The self-righteousness.
The hypocrisy.
The delusional arrogance, the belief that they're the center of the universe. They're just as retarded and pigheaded as the ancients who believed that the earth was the center of the universe, and they're too dumb to realize it.
The upvote/downvote system that literally hides dissenting opinions. Every totalitarian dictator in history would have loved it. If cuckit had existed in the 1600s Galileo's posts would have been downvoted to oblivion.
The outright lying, fraud, and constant LARPing. Almost every cuckit user pretends to be some kind of successful alpha chad who's a warrior, philosopher, historian, and millionaire all in one when in reality they're eating Cheetos at their computer in their mom's basement after they get home from their minimum wage job at Burger King.