Unprofessional managers will wear everybody down. However, the company either doesn't care or are too gun shy to solve these issues. I know of several people who either quit/considering quitting due to unprofessional managers or are refusing to work with these managers. There are unprofessional managers in every department, including finance, sales, and engineering.
In addition, there is pressure from managers to work insane hours, hence the low amount of WLB for employees. Unfortunately, this leads to burned out employees, who in turn are less productive and less efficient.