This is a very normal behavior. Your DD has standards of behavior that are significantly higher than her peers, and she's obsessing over the failure of others to meet her standards. It's a manifestation of perfectionism. You can tell, because if you substituted the word "perfect" for "fair" when she complains, the complaint would still make sense. You even used the word "perfectly" when you explained the situation, so you're already aware of the real nature of the problem.
One way to alleviate this kind of anxiety is to remind her that the behavior of other kids is someone else's problem, not hers. In this case, the problem is the coach's. If the coach decides to address the problem, or ignore it, that's his choice.
Above all, don't worry about things you can't control. Just go out and play, and have fun.
Depending on the sport, if she continually shows an ability to take instruction that's above her peers, the coaches will take notice, which can lead to more playing time, better positions, etc. But being seen as a complainer won't help.
