He's impulsive and doesn't know when to shut up. I got the distinct impression that, initially, he was absolutely not serious about buying Twitter. It was a joke/jest. BUT, because his antics affected their stock price he actually got forced into the purchase and now he's desperately trying to figure out how to make the purchase worth what he actually paid, which is fine and all, except he seems to be leading by impulse, not by consensus or logic. He wakes up in the morning, has some random ass idea and implements it without any oversight. Even his new CEO straight up admitted that she is basically a straw man CEO who will offer no friction to anything Elon wants to do.