I don’t see abuse. I see an exhausted, burnt out mother anonymously venting on a parenting forum. This is a mother who is at the end of her tether and who has lost her sense of self. A mother who has financially stretched herself trying to help her daughter, with private diagnoses and a best-fit school whose own work is impacted by sleep deprivation. A strong relationship needs positive interactions to thrive, and the OP’s DD is very challenging.
It’s clear to me that this girl cannot regulate her emotions at home. She hisses, destroys the house, draws on walls, wakes her mother to yell. I agree with pp that the need for all the stuff is probably part of an anxiety loop, dopamine-seeking behaviour, looking for calm that doesn’t come. I also agree that sertraline or another SSRI may be helpful.
The OP and her daughter need psychology help, not because the OP isnt being “kind” enough, but because the DD needs to learn to wait, to regulate her emotions herself and not be dependant on her parents. The OP needs help to establish very firm boundaries around this, but in order to so she needs to feel calm and regulated herself.
… and why said kids go no contact in the future
If this was my daughter, and I established firm boundaries, assisted with them with self-regulation and in doing so enabled them to leave home and live independently I would consider that a parenting success, irrespective of whether we were “besties” when she was an adult.
There’s an alternate outcome where the OP does what she likes, everyone over-explains, tries to soothe her, it’s never enough and she escalates from 14 years plus when things get really hard with puberty and an increase in academic and social demand. The destructive behaviour continues but looks like substance abuse and self-harm.
The OP does not and should not tolerate being woken for sleep - and if she’d been calm it never soothes her daughter, the behaviour continues - and this needs to be a wake-up (lol) call for the family. The OP needs a rest and the DD needs professional help with her emotion regulation and anxiety.