I'm glad you brought up how bad memories are easier to remember than good. My mom likes to routinely try to talk about good times she's had with me as a child but then will turn around and get upset when I don't remember any of it. On the other hand, I can very clearly recall the abuse I received from my dad around the same time period. Which, if I bring it up, my mom will simply say it never happened or I'm being too sensitive. Which sounds like a form of gas lighting.