I agree that it is frustrating when your engine is not running properly. What I have found though is that by troubleshooting, you end up learning a lot. You will figure this thing out eventually, and will know what to do and what not to do in the future.

I'm still learning, too. I had two dead-sticks yesterday, one just off a touch-and-go and it could have gotten pretty ugly. Luckily I only ripped the landing gear block out of the plane and was able to make the repairs in one evening. Could have been much worse. The bright side is I learned something and have one more tool in my engine tuning toolbox.