Yes, it's very common around here. Teachers, parents, and politicians are often rude. So people emulate it thinking that it's how authority should behave. I went to a management class taught by an ex-Deloitte employee - we were taught that employees are like donkeys, they need a carrot and whip to get anywhere. If they weren't donkeys, they'd be the managers. These people are not born sociopaths, they're trained to be so.

My resume and portfolio is dotted with these companies that shoot themselves in the foot. They were great teams, great products, but the managers decided to be rude and demeaning for no reason. It probably works for factories, but not in a world where it takes 6 months to fully replace a critical role.

Eventually a company or project bleeds all the good people. The project becomes increasingly hopeless. Stress levels increase because of missed deadlines. You get panic hiring where newbies are forced onto a late project (making it later). People are forced to work weekends. More burn out or quit. Stuff gets hacked together to last for a few months or so while the hacker is interviewing for another job.

It's conditioned me to stay far away from asshole leadership and run at the first hint of it.