Firstly, the higher torque
could have been the issue. During practice I had the wastegate on whatever the default setting is and had no problems keeping the car facing the right way, but in qualifying I cranked the wastegate up and found myself struggling to keep traction during some of the hill turns. I wound it back out for the race and had no problems.
Secondly, not everyone is a tuner, I'm certainly not. All I messed with was the final gear ratio and fuel load, which you can hardly class as tuning. So to say that everyone creamed you in terms of tuning is a moot point.
Thirdly, it sounds like you only enjoy a race if you win, that's fine, but in my experience endurance races aren't all about winning. To me it's more about getting to know the car and the track and more importantly the taking part. That might sound like a worn out cliché a loser would say, but go online in a public lobby and you won't even be able to find a race 30 laps long, let alone be able to race with a bunch of like-minded people that don't just want to put you in the wall at the first opportunity. Winning is a nice feeling, but so is having a clean battle with someone for 10 laps at full speed and finishing the race seconds apart.
I think if you forgot about the winning and relaxed a bit you would have enjoyed it.
I'll put the muzzle back on now.