We can't erase our histories, or how we grew up. Our wounded inner child will always be with us. We can, however, make sure to pay attention and practice self-care, so that this impostor doesn't act out.
Self-responsible means taking responsibility for everything in your life, even those events or people that do not in any way seem to be your problem or responsibility. Often the people that most antagonize us are the ones we need most to teach us what we want to learn.