I see where you’re coming from, but I think self-absorbed is more fitting than evil. Children expect instant gratification because when they were infants, what did the parents do? Immediately bend to every want and need that baby had until it was met. So if that’s how it’s been for as long as the child can remember why should it suddenly stop at 3 or 4 years old? It doesn’t quite compute with them because they’re not mentally developed enough to fully understand empathy and other more complex human emotions.