resentment is poisonous to the person who feels it. the person who is resented is usually unaware of or blissfully unconcerned with the resentment.
resentment is taking posion and expecting the other person to die. but it doesn't work that way.
in a divorce context, living well is the best revenge. we must let go and get on with our new lives. dwelling on what happened or on our ex's new situation (or partner/spouse) is sick.
While this is 100% true it brings me little comfort. The best that I can do at this point is to have the "shake the dust off my feet" attitude.