Almost everything you just posted applies to me also.
I have the same fears and yes she sees the negatives only it seems. I see the good but I did recognize that our marriage could have been better and I own my own faults even though they were not major.
One of the reasons I can not see my XW with another man is how she was towards me. Honestly, I could not see another man putting up with the crap I put up with. It took being single again to finally see what I should have been treated like by a woman.
But I can only make myself better and have. Ironically, she has to change herself so much more than me if she truly wants to be happy. I think she is in denial.
Me:48 W:55 M:22 T:23 Bomb:19Nov09 S:15Jan10 D:11Feb10 EA:Confirmed on 20Apr10 Fast track to her divorcing me