Because you shift responsibility for your condition from yourself to other people, or circumstances (to "everything"). Therefore, it turns out that it is not you who are mad, but "they enrage" or "everything enrages".
Nerves, my friend, nerves. Well, probably something bad happened in your life because of which you can't stand anything and you want to throw any object that comes into your hand at the wall. I hope my answer did not piss you off too much)