GM, I am truly sorry that things have gone "south". I had hoped that things would have settled down a bit for you and your w, but it appears that she is still on the yellow brick road searching for her inner self.
As for the apology, what she wrote is the best that she can do right now. I can tell you that this apology may be as good as it gets. They aren't very good at apologizing and accepting the blame for the destruction that they have created and left behind. To actually focus on the destruction that she's left behind would be too painful for her to accept and see w/her own two eyes right now.
I do hope that some day she will wake up and realize what she's lost. GM, time to continue moving forward and turn the focus back on to you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.