My heart aches for the many people I've counseled who experienced horrible & abusive parenting. They're still bitter. Remember, God chose your parents. He wanted their DNA to create you. That bitterness you carry is like a cancer- it started with your parents but now it has spread to other relationships and areas of your life. One day your parents, like my mom, may have dementia or some other disease that eats away their lives.. Bitterness has no place in the life of an adult child whose parent is ill. Move on, forgive. The one who is bitter and unforgiving is the one with the problem.
The pic is an excerpt from my afternoon devotion.