Gosh - it felt like your description of your daughter could be me - I don't know what she is repeating - but I've definately repeated behavious that don't have good results.

You gave her the tools...now it is up to her...

Just like everyone here needs support of one kind of another, I guess my advice is not to sever your relationship unless it is highly toxic...

Just some thoughts...as I don't really know what is going on.