Same as GAG the above paragraph caught my attention. Very similar in my case. When I look back I see clearly that H's view of me and our marriage has started to change after the affair started. After I found out about the affair he started his complaint list, and once one complaint was no longer valid he came up with a new one. He never wanted to work on our marriage he just wanted OW and was justifying his decision to leave...you are right no changes would have helped.
M53 H54 D17 M33Y T38Y Bomb OW 09/09 OUT 10/09 BACK 11/09 OUT 01/10 WANTS TO R 04/10 BACK with OW 05/10 Wants to Reconcile 05/11 I said NO