Geez where do I start. His treatment of women. His treatment of handicapped people. The Trump Organization. The Trump Foundation and stealing money meant to go to veterans. Implying that POWs aren't heroes. Using the Bible and Christianity as a political weapon. All the racial involved civil suits regarding his buildings (of which he settled multiple times).
That's without getting into his tweets, which are another representation of his character or anything that happened under his Presidency.
I'm sure people will try to defend some, or even all of these actions. But there is a clear pattern of scummy, entitled behavior.