I think we do, but not in the way you think. The Nice Guy typically isn’t anything like Eddie Haskell, because he’s just not that self-aware. He earnestly does think women should be falling all over him, not because he’s such a smooth operator, but because someone who was biased or trying to tell a polite lie told him so, and he was dumb enough to believe her.
It’s like these guys sat through those conversations we all have with our moms where they wax poetic about how brilliant and gorgeous and generally fantabulous we are and how we could have any man/woman/sheep we wanted…but instead thinking, “she’s my mom; she has to think that,” these guys thought, “she’s my mom; she wouldn’t lie to me about this.” Or they sat through the “it’s not you, it’s me, you’re a great guy and any woman would be luck to have you” speech without it ever occurring to them that maybe to some it degree it might have been them, just a little bit around the edges.
A self-aware person, even one who believed Mom and the ex who was letting him down easy at first, would re-evaluate that belief after the first few waves of women who don’t want him. Maybe Mom was a little biased, or just outright wrong, or not seeing something these women are. In short, maybe it’s something about him. The Nice Guy, though–these kinds of thoughts either never enter his head, or they’re quickly banished. If his path is paved with willing pussy, it must be something about all the women out there who don’t see how glorious he truly is.