Was it necessary??

I blew up on my supervisor this morning. Tension has been building up bit by bit slowly on and off for the past weeks or I suppose even months. Sometimes I get cocky with him or pull a long face when he asks me to do something. I just felt that he was a very poor supervisor. To me, the word "supervisor" is only a title. If you want to be treated as a leader, you gotta be a leader. He doesn't know how to be a leader at all despite what he said about being a restaurant manager at Earl's. At Earl's!!!. The guy can't even manage a simple business unit such as the mailroom where two other guys work with him!! Sometimes he can't even manage himself properly! And he's telling me he used to manage Earl's restaurant??! What kind of BS is this?? He says tragedy struck which completely changed him. Man, that must have been one hell of an event to have changed that brain of his. I don't mean any ridicule but so many of the things he says and does (or failure to) and decisions that he makes just don't reflect the qualities that a manager or a former manager would have. It simply doesn't register in my mind at all. I won't mention here what he has done or not done, but trust me.