Sports car racers are bad.

I have quite easily become a 3k+ i rating driver in both oval and dirt road and a 4k+ in formula cars I am just as fast in sports cars usually qualifying in the top 3 in any top split race I join but as soon as the race starts I get hit over and over and over again and I’m floating around a 2.5k irating with a peak of 2.9k

Why do sports car drivers race so poorly?