Sadly, too many American corporate heroes operate in jerk mode too much of the time. Some have temper tantrums in staff meetings, even throw things. Others humiliate people frequently. Because of their status, they get away with it. Because you will be more effective if your employees like and respect you.
People respond when they are treated with dignity.
They work harder for bosses they like. With competition for good people increasing, it is critical to keep your stars and be able to recruit new talent when necessary. You can learn new leadership skills at any age. It may not be easy to change. It's easier to achieve a clear goal.