I think that in the lon9 run, you shouldnt press too hard on the button. my elder brother was like this, he 9ets an9ry in the 9ame because he's playin9 on a difficult mode and squeezes the buttons to vent out is wrath.
inside the controller, there's this soft rubbery buttons that touches the circuit to respond when you press it. I think this rubbery thin9 is worn out.