I relate so much to this @happyfarm I HATE the gaslighting old cliche "they did their best", but it truly is the case for my mother, who came from a world of dysfunction, married a totally emotionally unavailable and unsupportive partner and probably has her old cluster B personality disorder, but never asked for help from anyone for a single day of her life.
Her best was total parentification, emotional invalidation and later neglect and abandonment when one of her kids dared to have her own personality and values. That was her best.
The number one thing she will say to me on the occasions where I have attempted dialogue about this is "it was not intentional", "I am a victim too". Somehow that just adds to my confusion, because as you say, the results are the same regardless of "intention", but now I have to sit here and feel sorry for my mother too? Impact over intention, always. It's the impact that matters, and that needs to be understood and apologised for if any repair can ever take place.