East, first of all, have a superb 2018. You are doing so fine even though your XW seems to be the hardest person to deal with what I've seen.
I just wanted to comment that I agree with OwnIt. Don't take the bait in any level. That is textbook behavior of a person who needs to disrespect someone else to get their short fix of "feel good". She definitely is not happy if she has to resort in this. A happy person would not care. It definitely is a short lived feeling though, only prolonged if you fall into it. I know it's hard but just forget about it. Keep being the kickass daddy you have shown to be; be the solid emotional pillar and the life guide for your D. She definitely needs one.
Also, I'm really sorry you have to deal with this. Just remember: this, too, shall pass.
In my thirties, BDd 2017, divorced 2 young kids new relationship