Ah mate ... congratulations. Welcome to hell!
Honestly, I couldn't survive that. I know the kid gets frustrated (and he's freakin' winning 30+ games a weekend
).
All I can suggest is take it easy - set a goal of 18 wins (for Gold and auto qualification for next week).
Also ... the one suggestion - kid does it too - go ultra defensive at the start, gauge your opponent and then try & score first! He stays on that even if he's level, or a goal or 2 up. Only goes attacking when he's behind.