Uh, it's not JUST that he hires crooks and/or people who despise and don't disrespect him.
It's that he's corrupt, traitorous, incompetent, and evil -- separate and apart from all that. Everything from his massive trillion-dollar tax giveaways to the ULTRA rich, to his charging the secret service $700/night to stay at his Trump hotels, to destroying all environmental regulations (again to help the ultra rich), to pardoning murderers in the military that even their own teammates want locked up, to disrespecting the office of the presidency by tweeting like some psychotic toddler 900 times a day. On and on it goes.