Wow! Sorry to hear the D went through so quick. So she was definitely on a mission.
That's not uncommon and while you likely will be down about it for a while and right now think that you'd not want to be back with her, the reality is, it happens. Not trying to give you hope, just what does happen sometimes.
If you want to break it down to the bear bones, your W decided she wanted out, had some pre-conception about you, and wanted to find her happiness elsewhere. It is very possible she won't find any happiness "out there" and reality will sink in.
So this is where your opportunity lies, whether your W's eyes open up to your value or not.
Begin to rebuild your self esteem and take a good look at yourself and consider what you may want to make better or change about yourself. This truly is an opportunity for you to make yourself a great man who would be a great catch for any lady.
It does not have to be if you do not want to consider it right now, but... it might even be your X, one day...