National Lampoon's Superman is a Dick feature, on what a jerk Superman really is judging from old superman covers would have been funnier if it wasn't so obvious from 9 out of 10 covers, that they're exactly supposed to make the reader doubt Supermans moral fiber and manliness. All of the "Superman does something nasty" covers are story hooks - even in the original material.
It's not half as funny calling Superman out when his dickness wasn't unintentional.