One of the parts I found especially "dark,' and that emphasized the differences in the two Kirks, was in the Kobayashi Maru. Kirk change the simulation so that the Klingon ships shields dropped, at the same time obviously the Klingons also stopped firing on Kirk's ship.What was "dark and gritty" about ST09?
So on the field of battle, you have hundreds of now defenseless Klingon warriors, who are no longer any threat to Kirk's ship or the ship he's there to rescue.
At which point Kirk orders the Klingons killed.
I can see that you don't play video games...
We don't know how the original Kobayashi Maru played out.
There's that, and I think at this point (nu)Kirk wasn't taking it seriously anymore and was more about proving a point or just being a smart-ass over thinking that it was a serious test any longer.