Technical skill isn’t your problem. The fact that you could be better at finding game or connecting 1A to 2A in your Harold isn’t why you feel like you bombed. The reason that you feel like you bombed is you. It’s you and your desire to lose. It’s you setting yourself up for failure. It’s your desire to prove the world right – that you suck and should probably just quit improv anyway and go back to sitting at home watching Bob’s Burgers reruns.
With every practice and every show, you’re working on your technical skill. You are constantly improving. You can’t avoid getting better.