The vast majority of the population of this country who are in employment will have at one time or another come across the horrible boss. They are the type of people who seem to go out of their way to be as abrupt and unapproachable as possible.
They seem totally oblivious to the fact that they are being this way and incredibly cannot believe that none of their staff like them. They are from an old school of thought that presumed that if you harass and bully your staff, you will get the best results from them, when in fact, nothing could be further from the truth.