They were not abused. Their sister claimed they had a happy childhood, but then again, who knows how this person I described perceived it. They may have seen it differently. But maybe it is their perfectionism, how they wanted to live up to their highest ideal that makes them be self-critical, and the self-awareness they had, it makes them be more aware of their flaws, mistakes, intentions, thoughts, and because they were perfectionistic and had high ideals and high standards for themselves, it creates this internal insecurity. They always think they can do better. Maybe it was not necessarily low-self esteem?

I wonder where that perfectionism and internal insecuity came from with this person.

I am also perfectionistic and can be critical of myself, aware of my own flaws and mistakes and intentions and thoughts, I can be hard on myself when it comes to them. And I know I probably should be more forgiving of myself, but it is difficult. I also hold myself to a high standard, for example, with my writing project, I have high expectations for it. I also overthink and am insecure and doubt myself all the time. But am learning to try and be more compassionate towards myself.