Don't try to get rid of the resentment. Trying to let go or forgive leads nowhere. Forgiveness happens naturally when you see that the point of resentment is to reinforce a false sense of self, to preserve the ego.
There is only one source of evil on the planet - human unconsciousness. Awareness is true forgiveness. With forgiveness, your victim identity dissolves and your true power is revealed - the power of presence. Instead of blaming the darkness, you bring the light.
๐ Eckhart Tull