I think he had a stroke at what would have been a young age to start having them from getting gakked up and doing hunter biden shit. Not so bad anyone in DC would notice or care. But bad enough that his kid found someplace else to be first chance they got. He would always have been shitty and an asshole. Drugs and then strokes would only have made thst worse. Strokes can make you grumpy. Useually not bad. But when you are rich and shitty your behavior can always get worse in ways people are forced to tolerate