My dislike of the man boils down to a few things. Most of this is based on the videos of him I saw awhile ago. The screaming at the camera, the YouTube style quick cuts, the rape jokes, his fanbase, the general shift towards people watching other people play games, the shallow content (he might cut it together alright, but it's still him just playing games and offering little insightful commentary), etc.
I don't have a problem with him making a living off what he does, I just wish he wasn't the face of YouTube and gamers.