I have finally had it and realize its not worth it anymore

[bbcoach7]

this "coach," wasn't even present at the game, and he wrote a letter complaining about your refereeing? I believe the word for that kind of writting would be fiction.

I'd have an issue with the admin who bothered to make you aware of this letter. Should have been round filed.

Don't let an idiot like this "coach" get under your skin. He doesn't deserve the thought required for you to have a resentment towards him. From your description, kids and this youth program are fortunate to have a game official available to them who is as thoughtful and considerate of the kids as you are. It would be a shame for the program to lose you over this idiot.