I will not pardon, excuse, absolve, condone, nor relieve.
But I will let go of my anger, because anger is a hot and tense emotion that--you're right--will eat at ME.
And I will grow stronger by letting go of anger. I think anger comes from confusion and feeling like one has no control over their own life, or from feeling vulnerable. And my goal is to feel none of those things.
My goal is to feel in command of my emotions, and what an exercise this has been! This is not one of my best character traits--the ability to ACT and SPEAK from rationality. I do tend to be very emotionally driven, and I'm not proud of that. But I'm learning to excuse myself, regroup, think before talking/acting, to talk/act from a point of strength. Anger and hatred (and shame and fear) can be intense, but not strengthening. And this situation has afforded me the opportunity to get hold of myself and exercise discipline instead of reacting. I can be proud of that, though it's a work in progress.
So, if your point is to let go of anger, but not for anyone else's sake, and to still hold MLC'er and OW/OM accountable for their actions but be able to move onward, then I understand your motivation.
I may not feel anger toward OW and H some day, but I will never like either of them and I will never feel any motivation to help them or give anything to them, including my valuable time. There will always be better things in life to do, more important people to spend time with. These are not admirable people. I do not even wish them well, for they have hurt people, and they'll need more than my well wishes or prayers to reform themselves if they are so inclined.
To love is to value. Only a rationally selfish man, a man of self-esteem, is capable of love—because he is the only man capable of holding firm, consistent, uncompromising, unbetrayed values. The man who does not value himself, cannot value anything or anyone. --Ayn Rand