Floyd, it seems to me there's too many emotions on both sides, especially hers. You can't really know what she's thinking, but I will say it's common for the WAS to see our changes and then get PO'd because we waited til now, or it seems so easy for us now, or whatever. It's likely that every time you are nice to her, or she sees your 180s, she simply gets pissed about it and lashes out to try to find the old Floyd in there.
Go back and read the article on how to lovingly detach. You need to get out of her head and start focusing on you. You are driving yourself crazy with all this.
She's pushing your buttons a LOT...and you are letting her. Get away from it. Do what you want to do for you and the kids.