The only draw back I can currently think of about this story, is that the MC seems like a genuinely good person, regardless of everything she went through literally since her inception.
Severe physical and emotional abuse from inside and outside the house since childhood...And she doesn't grow up to be fucked up, other than having low self-esteem? Really? I'd expect of her to either be mute, catatonic, or be a psycho.
And the only reason I am saying it's a drawback that the MC is not bloody insane, is because her character is currently too weak. Everything about her situation calls for her person to not be normal, and right now, she feels like a generic beta-MC. Pretty underwhelming, albeit the story does seem interesting.