Wow it hurt just to read this. Man you have to make some serious changes.
How did the guy act that your wife married (you back in 97)? How does the Kevin of today act compared with the Kevin your wife fell in love with? My advice would be to act more like him.
It seems you have great difficulty being in the presence of your wife. Perhaps you should have her drop the kids off at an intermediary’s’ house and you can pick them up without seeing her. Perhaps it is time for you to go dark and remove yourself from her life totally. What you are doing isn't working. I'd get a new plan. Google Plan B along with marriage and read about it.
I'm a man . . . But I can change . . . If I have to . . . I guess . . .