My ex showed up, the last time I saw her, to warn me that the Russians were about to invade the US and I should take precautions. She went on at some length about it, and was obviously serious. I just listened patiently. She finally left. This was about 2013 or so.
I ended up doing every chore to be done around the house, with three small kids, everything, including yard work. It was exhausting, and my work load went down when she moved out because I no longer had her messes to clean up. She came home drunk one night and collapsed on the couch and threw up and left the mess on the floor, and then claimed the next day it wasn't her mess. That was very near the end obviously.
She just didn't want kids, three kids into the deal.