YOU are the sole creator of your life. Nobody else has the power to create YOUR life, but you. Not your parents, not your spouse/partner, not your job, not your bank account, not your friends or relatives; you are the one creating your experience.
Since you are the only person capable of shaping YOUR life, why are you REALLY angry with somebody else? You expected them to please you or at least meet you half way and when they did not comply, you felt hurt.
You had expectations of them and you got angry when THEY could not live up to YOUR expectation of what they were supposed to do.
Probably you did not have a choice in shaping your experiences as you grew up, as most children do not, but YOU DO have a choice now to let go of anger.
Your holding on to anger only hurts you. You are the one suffering.
“Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned.”