I'm kind of a perfectionist and it was really difficult to face the fact that I failed at marriage.... The one thing that was most important to me. This whole journey has taught me humility like I've never known possible. I know, I know- it's not all my fault, but given the opportunity I would have done everything to make it "right".
I had those same feelings Feyth, you have no idea. Those same exact feelings. I felt like a complete failure. I still do at times. I told the wife that when everything happened. It is even harder because I think there could have been something special there.
But I (we) have to stop thinking of it as a failure. As you said, it is not entirely our fault. We need to take it as an opportunity and learn as much as possible from it so that our next relationships, with or without or spouses, are special and fulfilling. Steve Jobs got fired as Apple CEO once ;-).