You should complain. Write a letter to the principal, or something.
A similar situation happened at my school. In phis ed, we had to play a badminton tournament. We started out with teams of two going against other teams. He later told us that it counted as a skill test. If you got kicked out first round, you get a C for the 'assignment'. You get a B for the second round, and so on. Worst of all, some of the unathletic kids were paired with the extreme jocks.
I really hate it when schools do this. It ensures that even the weak kids who participate and do their best don't get good grades because they can't hit a damn birdie correctly, and that steroid enhanced jocks who don't participate get good grades because they've played the game before.
I'm not just referring to badminton here.