I agree with you on forgetting about her mom and taking off for a local like Alaska. but disagree on her not amounting to anything. if she allows Rosie to control her life then I agree with you.
My humble opinion is that Rosie is more or less a 14-year-old kid in adult clothing and can’t be responsible for much of anything. So trying to supervise or provide guidance to some kid....is about the worst thing that Rosie could do.