Once we understand we are human, with flaws, weakness, and faults, we hope to be forgiven, and in turn, we learn to forgive others, because they are only human as well.
Keep in mind that an anger harbored in your soul turns into resentment, then fear and hatred, and then a cancer, so imagine a worse-case scenario, count your blessings, and again, move on. None of us are perfect, and some are woefully less so than others. Forgiving is good for the soul.
This does not mean you have to forget the injustice but perhaps you will learn to never floow in the same footsteps as your parents did with you.
I am glad your all in therapy.