What difficulty are you playing on? I find that depending on the conditions, I can be pretty competitive. But if it's raining, I feel like I have to greatly reduce the difficulty to even stand a chance.
Also, have you adjusted FFB at all? I don't know if I have something calibrated wrong or what, but I essentially have no FFB until I reach a certain steering angle, and then it all comes in at once. I can hit rumble strips and feel absolutely nothing. I feel like I have something wrong but I've put in the recommended G27 settings and haven't found much improvement.