I recall reading an article about Steve Jobs. His managerial style was, interesting.
-If an employee was wrong according to Jobs' view, he would directly cuss out such employee and drop the F bomb repeatedly.
-He was not hesitant about shutting down projects that didn't seem to be able to succeed, and occasionally firing the entire team.
-Before the mid 2000's, one of Apple's suppliers was being a jerk and constantly late on the shipment. The supplier threaten a lawsuit if the contract was canceled, and Jobs canceled it anyways to set an example and took the lawsuit hit.