what to do now with unsporting behavior from coach?

[rcwilco]

As has been said. Game over, leave! The end of the game has all the potential in the world to be an emotional time. Staying can cause many unpleasant things to happen as you learned and (IMO) can even be construed to tempt the fans and coaches and place them in the wrong postion. Even when I do volunteer youth games at my church I do not stick around waiting for thanks or sportsmanship. It can create an opportunity for trouble. If I have to wear my uniform there for some reason, I cover it up before and after the game. I hope you continue to have fun.