He's a strange one, for sure. A doc I know said he scores high on a "Personality disorder" scale. Someone you'd expect to be in all sorts of trouble in society.
I remember watching a few episodes of the US version of The Apprentice, though. Half the contestants were D-listers who had their own personality disorders. I found him to be impressive, though. He was very good at seeing straight to the point, with a clarity of thinking which you don't see very often.
(Piers Morgan was on one of the teams - they got along very well.)
It's just, those shortcomings he has, in so many areas. He misjudges people widely, fron Kim Jong Un to that a hair-dye clown he had as a lawyer, and varous other bent people he tried to use like Steve Bannon. Then there were the whole sections of the public who went on to cause riots and follow the Qanon cult.