He didn't seem disappointed in her over the Palpatine connection. This would probably do it.

"I was making terrible decisions. Just... I would get so worried about losing someone that I'd lash out and then the situation would be worse, every time. I thought I killed Chewie by accident. I almost killed Ben on purpose. It was like a bad dream, where you have a goal but you keep getting further from it because every choice you make is wrong."