Although I wasn't facing the same changes in life that you are, yes, I had a lot of self-loathing. Every comment my XH made about why he left cut deeply and I took at face value instead of realizing he was projecting his issues on to me.
I couldn't go to the mall because of all the photos of beautiful women and I imagined how OW look like that. I felt worthless.
How wrong I was. He was the one that was in turmoil and had projected his weaknesses on to me. He was the one that was doing ugly things by lying, sneaking around, gaslighting me, etc.