For my mom, it's hard to identify what I hate "most." She obviously has undiagnosed mental illness, and it's certainly what fucked me up as a child, teenager, and young adult. So I guess it's her obsessive, overbearing nature that made me such a nervous, scared person. My SO had to spend time with her lately, and has started to realize just how bad it is. On one hand, that helps me feel validated, but on the other, nothing has threatened our relationship so much up until this point. I hate her for that.
For my dad . . . my SO thinks he's awesome, and he generally is, but he still let her mess me up and either didn't realize it was happening or let it happen, so I resent him for that.
I hate how they downplay my achievements. Nothing I do is ever enough for them. They always want more more more and more
That can be so deflating. You hear people say "don't compare yourself to others! Compare yourself to you yesterday!" If the people who are supporting you the most are encouraging you at your own pace, it's basically impossible. (which is part of why I think that advice is BS, but I get the principle.) Besides, I get the impression you are younger than me (not hard to do), and it's time to acknowledge that younger generations are facing huge challenges in life even my generation didn't have to. You've got your head on straight, are empathetic, and are doing enough to have at least
some accomplishments. That should buy you some support.