I also sometimes fall asleep in the theatre. It's no shame to admit it.
But seriously, you can't have missed how Spock and Kirk slowly start to become friends, that's all the movie was about.
One could complain that McCoy did not get a lot of screentime and that he had only one scene with Spock, but he did not have much more in previous Trek movies either. I doubt that it was possible to squeeze a third friendship (Kirk-Spock and Kirk-Bones were covered) into one movie.