Here are two questions that serve to show the level of depth that you're not seeing in the book (but very much exists):
"What is Lillian's view of sex? Why does it torture Hank? Is he right or wrong to accept that torture?"
"How has Hank Rearden's attitude toward and treatment of his family changed? How -- and why -- has it remained the same?"
If you can't see it in a fiction book, perhaps Tara Smith's "Ayn Rand's Normative Ethics" might help you to understand the nuance of Rand's moral philosophy. (Tara Smith is a professor of philosophy at the University of Texas at Austin.)
And even if you hate her characters and her philosophies, with exchanges like the below, she is a least interesting to dissect and deserves more than dismissing her writings to fourteen year olds.
"Do you believe in God, Andrei?"
"No."
"Neither do I. But that's a favorite question of mine. An upside-down question, you know."
"What do you mean?"
"Well, if I asked people whether they believed in life, they'd never understand what I meant. It's a bad question. It means nothing. It can mean so much that it really means nothing. So I ask them if they believe in God. And if they say they do--then, I know they don't believe in life."
"Why?"
"Because, you see, God--whatever anyone chooses to call God--is his highest conception of the highest possible. And whoever places his highest conception over his own possibility thinks very little of himself and his life. It's a rare gift, you know, to feel reverence for your life and to want the best, the very greatest, the highest possible, here, now, for your very own. To imagine a heaven and then not to dream of it, but to demand it."
Nietzsche is not only a much more eloquent writer, but his ideas are far more profound.
Rand's characters are cartoon heroes and villains whose distinguishing characteristic is a leaden humorlessness.
Her moral philosophy is as cartoon-like as that of the communists she hated so much. The world consists of a few beleaguered (and attractive!) supermen, and the great mass of sponging inferiors who bleed them dry.
This is heady stuff when you're fourteen, but it bears about as much relationship to reality as the Left Behind novels, which offer the same kind of subtle characterization and philosophical depth.