Being a perfectionists, I form resentments against myself for not releasing my resentments towards others. I know that a resentment is just a form of anger. I understand that anger fits within the grief cycle which consists of: Denial, Anger, Depression, Bargaining, and Acceptance. Even so, I expect that I will turn loose of all my resentments. That is the goal for Step 10 - a daily inventory and reconciliation. Thus, I become angry with myself whenever I recognize that I am angry regarding a resentment.
The way forward is to forgive myself first, thus freeing me to forgive others.