The marriage is over, the financial arrangement has been, agreed to and fullfulled. It's over.
Perhaps if she is finally left to take care of herself, she will hit her bottom, she never will, if you
continue to financially enable her.
A divorce is just a legal document, the emotional part of the marriage is always disolved before one signs on the dotted line.
Do what is best for you, it is your life to live, no dress rehersals, this is it.