You don't have to dig very deep into "Dream Song 14" to realize that Henry doesn't feel satisfied with life. He's bored. Really, really, painfully bored. And he lets us know it. But as he lists all of the external sources of his boredom, we start to feel like the true source of his dissatisfaction is internal. Like, it's all in his head.
When you're unhappy with yourself, nothing in the world will bring you happiness… unless you change your attitude.
Romanticizing nature is, like, so classic poetry, and Berryman is over it.