what to do now with unsporting behavior from coach?

[Kelvin green]

My suggestion...

No matter what the level, no matter how well you thought the game went.... stay away from the coaches, stay away from the fans.

Get in, get out, get done. Although it may be a sporting gesture on your part, you can tell by your experience it creates more problems than it is worth.

Do not worry about sending a letter. The fact that he berated you in front of some plaers is no big deal, if he would do it there, he'd do it in the locker room or anywhere else. Learn from this, drop it and move on.