war dog, I wish I could get back all that time and energy that I wasted worrying about politics, worrying about what the other parents were thinking, and even being mad at some of them when I learned that they thought he got his playing time due to "politics."
Now I know that none of that stuff matters! What matters is what he did, and continues to do, on the field. Not what happens in the stands.
Follow the advice you're getting! It will be hard sometimes, but do all you can to avoid the negativity. It's bad for your health!
There is one more thing your son can control. His grades. You'll hear it over and over again, and it is the truth. Good grades really do open doors.