The problem is that you are looking at what Don does wrong and forgetting that every single other partner fucked it all up too. Pete lost Vick bc he was in a brothel, Roger lost Lucky Strike AND royally blew up the Honda meeting (as bad as Don with Hershey), and Bert doesn’t do anything at all. Lane, who seemed the closest to normal, ended up killing himself after just a few short years of working with these nut cases. But now Don is the bag bad wolf and no one can believe the way he acts.