To be serious for a moment, though, I think one of Millar's biggest problems as a writer is that, for all his would-be liberal political trappings, he really does favor a Frank Miller-flavored might-makes-right fascism in his "heroes" - setting aside his work on Superman and the Flash for a moment, every single fight in his stories is won by one guy being meaner and nastier and more brutal than the other, or else, as in the case of Spider-Man versus Green Goblin at the end of his Marvel Knights run, a deus ex machina steps in (lighting struck Norman TWICE, FOR NO REASON), and even with Superman and the Flash, he was often able to reduce the conflicts to I HAVE MORE POWER THEREFORE I WIN.
The problem is, if you really do prefer your "heroes" to be unrestrained fascist bullies, then their opponents need to be absolutely, inhumanly evil, or else the audience is going to start asking silly little questions like, gee, is this excessive and unforgiving amount of force justified? And in MillarWorld, it MUST be justified, because he doesn't WANT morally restrained heroes - he wants a Captain America who would call Jack Bauer a pussy for how much he "holds back."
Thus, Doom MUST be one-dimensional, or else all of MillarWorld falls apart.