You need to realize that her journey is not about you. She is angry at herself and the world. You could have given her gold bars and she still wouldn't have been happy. Think about it, if she was so unhappy all of this time, why didn't she talk to you about it? When they are "out there", they rewrite history. That means, everything on God's green earth becomes a problem for them. They talk about everything you did wrong, but they very seldom point out what they did wrong. They also talk about how many months and then years that they were unhappy. Bottom line, it's her, not you w/the issues.
It's called the "dance"...when she can't get what she wants, she will use anger and if that doesn't work, she will find other ways to rope you back into the dance. When you distance yourself from her and go NC, she'll try to contact you constantly. Read the thread on The Dance of Pursuit and Distance. It might help you in the days ahead. Here's the link:
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.