Why do I still feel worthless and not enough after being in a relationship with a narcissist?

I found the courage to escape from a narcisstic partner. I know the abuse i endured was not my fault. I know it was because he's a narcissist. But I just still feel so worthless and not enough. I don't know why i still feel like this when I know what he did to me and all he put me through was because he has NPD

Why do I still feel worthless and not enough after being in a relationship with a narcissist?
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