If I was you, I would try supporting these men that give their energy, time, passion and love to your children ... using football as a tool to prepare them for life. Especially when your son is with the coach more than you. Get to know them, how you can help, get to know their families sitting next to you in the stands. I’m sorry if they made a play call you disagree with; they have quite a bit on their plate.
And I'm not here to defend the actions or play-calling of every coach. We've been in the business long enough to know not all coaches are good coaches. There are bad ones, and maybe one of them happens to be standing on your sidelines. But man, there are a heck of a lot of really good ones, too, and even those aren't immune to the name-calling and criticism that's lobbed from the stands in their direction.