MCS, this looks tough on you. You do seem exhausted because certain things seem to affect you greatly. You probably know that you shouldn't be thinking too much about how she feels and what she thinks, anymore than it affects your relationship with your kids. I guess a little distance might help you to see this more clearly.
I've little experience because my W and I have always been cordial and communicate very, very little, as you know. So I don't have good advice for you. I only want you to know that I'm still reading your thread religiously (ha!), as always.
M39 D6 D3 (at S) S 2014-09 D 2016-09
"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.