You'd be better than most (if not all) pilots here, if you got Zico in under 300 laps, got to Zone 75 in 2 days, and didn't have trouble fighting the elite AI. If you've only been playing this game since Christmas (just guessing here), give it some time. I've been playing it for over 3 months now, and I still haven't reached Zone 75. My advice is the same that Cerium gave you: forget about the stupid trophies, they don't mean sh*t. Go online and have some fun! (and there's lots to be had, I assure you)
And in case you haven't yet (again, just guessing) - turn off PA!