This has been a horrifying thread - a car crash, as somebody said.
And this is precisely why I don't post about the hideous problems I have had with my daughter. Because, of course, it's all. my. fault. Apparently 
Of course it is - mothers, represented so forcefully on this thread - like to think that their children are a direct representation of their parenting . Absurd, arrogant, misguided - I'd laugh if it weren't so tragic. During the horrific times with my daughter, mothers like this crawled out of the woodwork, endless numbers of them - not in support but in 'I'll do this Properly. You have obviously failed, the poor lamb with a Bad MOther like you. You are a Crap Parent. The poor thing is obviously disturbed by you and is it any wonder? You bleet endlessly about yourself' (when in fact you are in so much pain you are looking for support and will, therefore, be talking about how you're feeling).
Poor, poor you OP. I battled through pages 1, then 2, then 3, then 4, then 5... adn on it went 'You are a crap parent. YOu are selfish. Your poor daughter with a mother like you: selfish, partisan (preferring the other daughter). You think you're wonderful eh! You're daughter PROVES you're not' and on and on. As if she in an innocent, not a bad bone in her body. Projection, I think.
I feel so sorry for you to have been eaten alive like this on here. I found it unbearable to read (obviously because I'm a Crap Parent and a Bad Mother and I won't face my faults!). Really, I think the majority on here don't know what they're talking about. They may know what they're talking about with their own mothers, but they have NO IDEA what it is like to have a daughter who is hellbent on destroying you. Think domestic abuse. But it's your own child. The pain of it is unbearable. (So bowing to her demands is not going to work [how do I know that], just as it wouldn't work to bow to the demands of a partner who is abusing you half to death.)
I may be posting prematurely because I couldn't weather the last few pages - apologies if things have improved. I am shocked at the vitriol aimed at mothers who are broken-hearted, have tried every possible thing on the planet and then some; but are still castigated, insistent that the Blame should be hung squarely on our peg. After all, they're not going to have daughters like this - because they are Good Parents. Deluded imo (I hope they don't find out the hard way, as we have).