Whatever she does is outside of your control.
The only thing you can change is your own behaviour - be a little selfish, make demands for yourself, tell her you do not want to witness any more of this bad behaviour and you will have time for her when she behaves herself. Try to take no notice of her nonsense.
Meanwhile try to take care of yourself, learn how to relax and also how to stick up for yourself.
Do not confront your daughter ever but try to make suggestions and guide her in the right direction. Do not put up with anything you are not happy with, do not be walked on or allow yourself to feel used.
You must be tough, she will sink or swim and you can only stand by and hope for the best. - meanwhile concentrate on the rest of your family and yourself.