Be positive, drop the negative like a hot potato. Look for the good and count your Blessings, it beats looking at garbage. Transmute your pain, rage, temper, etc. into constructive action, you can do it in fact you're the only one who can. Start by forgiving yourself and others. I know it's hard, but it works.
Constructive attitudes build, negative ones tear down.
Begin seeing this problem as an opportunity. When we make problems opportunities, we make them our allies. When that happens we see things more clearly and we learn better ways to deal with them, that brings about better results. Criticism only hurts when YOU let it. You too can have courage.