Anyone heal from Narcissistic abuse? (Or any trauma )

Some days I feel I will never heal. It was extensive, debilitating, awful abuse for 25 years straight..daily. I feel some of this was so horrible that I am too far gone to be helped. I have extreme self doubt which I read is a top result of Narcissistic abuse or trauma. I have read books and have been in therapy but most therapists do not offer much on tips or ways to really DEVELOP A SELF. The narcissist eradicates your Self. (And enjoys doing so)
I feel I don’t even deserve normal things or joy or love. Any tips that helped you..if you also experienced this atrocity? Thank you for reading🪻