I wasn't being flip. His head is full of mush and delusions. He is unsatisfied with his academic success, girls, and hobbies because they do not cast him as some kind of mythic hero. He needs to get rid of that illusion. Throwing himself into the army or a startup company would just be feeding it. Once he stops doing things only to aggrandize his self-concept, he might find something he actually finds interesting or beautiful and from that will spring endless energy.