Lt. to Captain in one shot is still a ridiculous and stupid move, particularly for such a ship.Lieutenant to Captain.
"The feels" have dominated ranks in Trek for a while now. The idea of being a captain means more than reasonable advancement. People can turn down rank at any time and opt to not advance their career because of their feels. Being a captain is the only place you can really make a difference so don't leave the bridge.
This is not a new phenomenon in Star Trek. Bring a captain is great and being an admiral is horrible. If that isn't about the feels I don't know what is.
Plus, he went from cadet to Lt. immediately... without even finishing the Academy. Just stupid.
And Kirk was in the middle of a disciplinary hearing and quite likely would have been drummed out of the Academy, which makes all of what he was given even more stupid.
So yes... within the same mission, he went from cadet to captain. Utter nonsense and stupidity of that movie. (One of many.)