Righteous indignation is a useful kind of energy, if properly focused.
But you can control your temper. None of this is pleasant. Now, use this righteous indignation to give you energy to do something useful, like working out. Nothing's better than a good marathon run to help burn off some of this energy. I don't know that I would suggest you start a full workout routine, not now, but getting out and burning up some of this indignant energy will help.