There's another possibility that I'll admit is only my own speculation. There could be a medical problem that causes this behavior.
Hmm, that'd be somewhat ironic if it turned out she's bipolar. Planetary speaking

Anything she accomplished as an astronaut doesn't convince me I should admire her as a Governor General. Spending years developing your own career doesn't make a good leader.
Oh, of course. I don't think anyone is arguing that it would automatically make them a good leader. It's just such a shame that someone with those qualities had to have a destructive behavior. Talk about someone who's needed to get back down to earth. I don't know if she'll be able to get a high profile job again. At least we know she's definitely not a people-person.