I still maintain we are married to the same woman. The emotional drain of "never being right" is a killer. It seems like your W. is IDENTICAL to mine in that regard. She once told me that she saw Dr. Phil (I threw up in my mouth...but just a little) said” Would you rather be right or happy?” She honestly said "I can't tell the difference".
Although I desperately miss the woman I married, she's GONE, as it sounds, is your wife. They must be so very insecure in themselves, and really internally miserable. If you're like me, I cannot honestly, honestly ever remember her saying "I'm sorry" for anything. She talked about me not "meeting her emotional needs", but after a while, I was filled with resentment for always having to take the high road and say "This is stupid, I'm sorry", even when I had nothing to be sorry for, she made it seem like I was a total fool all the time. I was also emotionally exhausted. The diabetes story is typical. Who needs that? Strangers get treated better. Doormatus maximus!