She also seems to hold him responsible for Johnson's downfall. I know Rishi sounded the starting pistol, but it was happening anyway. If he hadn't, someone else would've.
Johnson was finally removed when enough of his colleagues realised he was a liability. That's also why he stayed removed. Given that, as she explains in her diatribe, the Tories are fucked and they know they are, if there was any chance of him doing better than Rishi is, they'd have reinstalled him as PM. And backed him over the standards investigations and sanctions, which couldn't have happened if the parliamentary Tories had prevented it. There is a reason they haven't.