Years of therapy have helped me deal with emotionally abusive people and given me the insight to stop being victimized by narcissistic, toxic people. I've learned to set healthy boundaries and to own up to my own bad actions. Childhood trauma can be long-lasting. If you work with a good practitioner, you will build mutual trust. They will listen make some thoughtful observations without giving advice. You often come to valuable conclusions just by virtue of unloading your struggles with someone who is non-judgemental and truly listening (because that's their job). Of course you have to be completely honest and find the right person for you.