I worked for a boss who was brilliant and a great individual contributor, but had poor instincts for team leadership. I think I hated his management style the most, but I remember one of my coworkers screaming at him on a voice call about how rude and cruel he was, and that all he did was speak to people with disdain. This guy was a post-doc fellow at some university and led grad students before taking on a team of 10 IT folks. His instincts were so driven by the academic cadence he was used to, he wasted quite a lot of money fussing around about this and that, and never really delivering product. It was a mess.