Yeah. That's a huge problem with my Mustang in the GT3 series as well, not to mention it being very nose heavy. I have to brake earlier and take corners slower than anyone else, but I have the most power. I am honestly surprised I got second at nurburgring and was able to get in the top half of the field at Madrid with it. The next race is at Rome, where my Mustang is very happy about.
Usually that's my approach in most cars with most turns. I brake with enough room for error, and when I hit the apex, I accelerate, careful not to spin my wheels. And I usually try to get the braking done in a straight enough line as possible, reducing tire wear on the front tires. Maybe I was a little too aggressive at times. Normally I'm really patient with passing others, but that race was just terrible with me. I only kept getting aggrivated at myself hitting othe people and it got worst, not because of me not being able to get a good finish. I could really care less about my final position. I am reserves after all. Thankfully, it didn't get extremely bad. And it usually happens at that spot, too. First, second chicanes, no problem. Third, well you know.
At one point I was really thinking about parking myself in the pits because of how I was doing. I really didn't want to ruin anybody else's race it was that bad. I mean, at one point, I overshot the last turn while chasing MojoToker (his Viper) and I accidentaly tapped him. Not seriously though, but enough to get him a little unstable and have me gain the position. I was trying to give the position back, but a damn GT1

lapper got in the way. I almost had him slam into my rear. I got out of the way and gave the position back though. I felt like such a jerk when the race was over. I was ready to accept any penalties that Jav may have thrown at me because of this. I'm surprised I haven't received any yet, though.
Oh and also, I wanted to say that when GT1 is overlapping the GT2 guys please don't swerve immediately right in front of us GT2 drivers before a corner. It can really upset the balance of the GT2 car, aerodynamically, especially under heavy braking zones.