Fang let me tell you my 2 cents.
I've been playing Il-2 almost since it was out. I joined the online battles back in the end of september, and still I get owned most of the times. Why? The reason is simple, this game requires some practice and dedication. Usually I am never able to play more than a couple of days straight, then I have to quit for a week or so.
When I'm so lucky to play 3 or 4 nights straight I become a decent pilot, I see my enemy, I can stay on his six and my aim is not so bad. But everytime I have to quit for a while it's like being back to noob level, and I have to re-learn all the stuff - and I finish getting owned like tonight.
So I know it's frustrating, but if you can play a little constantly you'll become a good pilot in no time! Plus the guys here are fantastic, and are always ready to help and give you tips, so don't give up!
Ps. praise to you guys who are able to handle both PS3/Xbox and women. Mine was a suffered choice, but the presence of the "turn off" switch on the PS3 made it easier