There is this weirdo that runs a channel called Mad at the Internet...
There are lot of suggestions in this thread that I agree with. Daft Pina has definitely gotten worse over time, lot more attacking artists for political opinions rather than because they ran scams or did something actually bad. EmpLemon will eventually sperg out in a way where it sticks to him. See SOTY (Reddit debate for one) or his rant about YouTube Poop and how he wasn't given enough recognition.
Agree about Dreamcastguy, he seems to have a dedicated community of haters already. I like him well enough, but I get annoyed by him at times. I don't know if it has ever been confirmed, but I think his fiancé left him, it's why he moved house and sleeps on the bare ground now instead of a bed - didn't buy a bed but bought multiple PS5s and Xboxs for himself and to give away. He would be one to look at in detail, not sure what kind of sperging he has done.
There are a lot more. As someone said, lolcows and potential cows are attracted to the platform, I guess because it is all about gaining attention from as many people as possible. My problem is that I tend to just unsubscribe when people's eccentricities start to ruin the kahntent.
Quick list of other potential cows, might expand on why I think this later - Thorhighheels, Nightmare Expo, Nightmind, Izzy Nobre, Extra Credits, School of Life, Christopher Niosi Aka Kirbopher (went to do a thread on him but abandoned it), Jordan go to sleep, Mamamax, Max Forrest, Nyx Fears, and Stamper (as much as the last one is painful to say).