I found my time was much better spent focusing on my own recovery.
My sponsor used to remind me that focusing on the "why" was a way of sidetracking work on me. I was to ask myself "what do I do about it now?"
My best suggestion is no contact, and that includes not taking his phone calls and not reading his texts.
That is what I had to do with my EXAH.
Sending you hugs of support from an old gal riding out the blizzard in Kansas!