Why did you go back? I don't understand why after what you described you so much as watch his content again, never mind donate to him.
It's like watching someone in an abusive reletionship. It is so often the case you see this pattern repeat itself again and again. As much as I, as the observer looking in from the outside, am trying to understand what it is you see in this, I just can't see why you keep giving second chances. Just stop, please? Let his online career die the slow death it deserves.