Yep, so many of those running around, I guess we'd better just start giving them Starships. Because I would want the morons I see wandering around the neighborhood in charge of one of the most powerful weapons in existance.
Well, you're deliberately ignoring what the film tells us about Jim Kirk. A man who is considered a genius and completed the Academy in three years. Plus, we have no idea of what type of experience he gained from ages 18-22 before joining the Academy.
But none of those facts fit with your gripe...
No, no, he isn't, in fact, a moron. I know. But as long as he considers himself above everyone else, he does not deserve command. As far as i'm concerned, that's pretty much the bottom line. That and the fact that someone at Starfleet should've had enough brains to realize that before he was promoted in the first place.