I have seen from my experience in the industry that a leader that lacks empathy is the worse. People work not only for $$$, but also for respect and relationship.
Some bosses just keep working on “his/her” things without spending time on developing the skills of his/her employees. S/he fails to understand that s/he is as good as his/her team. Without any direction or mentorship, the team becomes dysfunctional within a short time.
Some bosses doesn’t provide feedback at all. Some bosses provide feedback too much. Some bosses only provide negative feedback. All of these are bad. There should be a balance on the feedback. Nobody likes to be judged all the time or hear only negative things.