This one boss we had was a predator. He promoted based on who he wanted to have sex with, and it was obvious to everyone in the office because of who his targets were. He exclusively promoted young twenty something women who all had a certain look, and nothing on their resume, to be his deputies in the division over the experienced personnel, people with more than a decade at this company. He was literally giving fresh college grads supervisory authority with their own staff in some gross quid pro quo or grooming exercise.
And then he wondered why HR was all over him. It was because he wasn't doing his job (canceling meetings constantly, late signing documents, dropping off the map on business trips so even his secretary couldn't get hold of him). And he believed that by making these young women his personal deputies, they would like him and he could convince them to bone. Which I'm sure the ladies had no interest in, given that he was a 5 foot something, 300 pound, glazed donut of a human being.
One day he got into a verbal dispute with one of our colleagues who was passed over for a raise, over boomer's inability to sign off on performance evaluations in a timely manner. He fucking begged this guy for weeks to get these documents signed so people could get their performance incentive checks. Coworker told him, “If it's between me and you, HR only have to look at your promotions,” and boomer backed down.
He quit before he could be fired. And I'm sure he's pulling the same crap at his next job.