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...