I'm sorry that you're dealing with all this, Coping. Infidelity and the continual fallout truly does suck.
I, too, have a wife whose movement towards effort was P A I N F U L L Y slow. You have remarkable patience and endurance.
I can't speak for everyone regarding the mind movies, but I do have a similar story to yours in the HB world, followed by intimate times that get 100% derailed by mind movies. Seems to me that it likely is normal to have that issue.
I also understand the deep frustration with this:
don’t I get any privacy?
The correct response is "not if you are serious about rebuilding any form of trust". The ball is left in her court with the reality of the depth of the betrayal squarely at her feet. If she is doing serious, positive work in herself, she can own the repercussions. If not, no great pressure in your lifetime overcome the lack of trust. There is a give and take, but SHE is the one who needs to do the heavy lifting to prove herself. You don't need to force yourself into another blind trust situation. We all know how that ended.
I don't like the whole "switching places with the AP" nonsense. Sounds like that book was written by someone incapable of describing what is REALLY going on emotionally. That whole "feeling more like a friend" piece...that is a feeling born out of self-preservation. You have built emotional walls of protection around yourself because it isn't safe to "come out and play". Your heart know that the last time you felt safe, you got brutally betrayed. So, rather than forcing yourself to go back out there meet on the playground to play again, SHE needs be be out there demonstrating that she is creating that safe place. It's the whole Charlie Brown & Lucy with the football. The heart wants to believe that she won't pull it out from under you, but the head says "well, she keeps doing it, so I'm not going to trust that I won't get hurt again." Because of that, we stay protected behind the wall, no longer intimately.connected emotionally.
That's not to say that there's anything wrong with protecting yourself. There is a REALLY good reason for that.
Brother, I have lived your life. This year marks year 29 of marriage for us. I stopped celebrating anything after year 23 (D-day v1.0 was 7 months before our 23rd anniversary).
No cards. No date planned. No fancy dinner. Nothing. I believed the vows I took, even though I was 19 on our wedding day. I believe in loyalty, fidelity, self-sacrifice. I beliwve in "'til death do us part." All of that was taken advantage of. So, August 6 is now nothing more than a date that is 2 weeks before my birthday. Nothing more, nothing less.
While my wife has made changes in herself, it took more than 5 years (and a REALLY good MC) to get that started. But it didn't truly happen until SHE decided that it was worth the effort.
That's a decision she has to make. You get to decide if you want to continue subjecting yourself to the person who deeply betrayed you. I don't say that to shame or to move you one way or another. It's just the reality of the situation. Only you know what you want/need in order for the relationship to return to thriving rather than merely surviving. We each have a role to play.
I would encourage you to take a long, honest look at yourself and what you want/need. Then have the conversation with her that sets guidelines/boundaries. There is nothing selfish with voicing your desires. The selfish part comes in when they aren't voiced, but you react negatively to their dismissal as though they were written on the wall and she saw them daily.
Make sure you're advocating for yourself. No one else will.