The crew's behaviour only makes sense if it's some sort of mind control. But because it isn't depicted as outright mind control then their behaviour is bullshit..
Exactly. The movie can't seem to make up its mind if the crew is being mind-controlled or not, but, seriously, Kirk's crew is not going to mutiny unless they're heavily under the influence of alien spores or whatever. Period.
And I'm amused to see that nobody has even mentioned the WTF moment with Scotty and Uhura . . . .