Sharkhawk,
Part of life is imperfection, our emotions are volatile, that's part of being human. Football isn't the issue, thats not the root of anger, its merely an vehicle that it comes out. Removing football from your life, in my opinion, does not solve the root of the problem, it merely hides it until you invest yourself in something else.
I don't have children, so I haven't experienced that exact situation, but I've lashed out at loved ones and friends multiple times over the years about the Seahawks. It's amazing how much a game that we are not participating in compels such powerful emotions. I never, ever, get as upset when I'm actually playing a damn sport.
That's my two cents.