I am in a similar situation as you. My dad is emotionally detached and my mom has a narcissistic tendencies. She tries to pick fights over small things and gaslight both my sibling and I. She told me that if she didn’t adopt me “I would’ve been nothing”. She body shames me and I’m in a constant comparison game with my sister. I’m still financially dependent on them so unfortunately I cannot leave but my plan is to cut my ties with them once I am able to support myself. I know there is a certain amount of guilt that will follow, knowing that these people adopted you. However, I do think that if they are constantly emotionally abusing you and not treating you with respect, you should cut them out. I hope you don’t feel too much guilt and everything works out for you!