This leads us to where it is that Les went from "passive, clueless, hand-wringing nitwit who didn't know what was going on around him" to "Complete Monster." You see, he read the book that his adult self wrote and hopes that he doesn't remember what he saw so that he won't have to act at all. What's more, he wants to keep Lisa from speculating overly much about the future because he believes that she, a mere girl, cannot handle a future that terrifies a man like him. The problem is that they do remember what they've seen. What this means is that teenage Les knows exactly how the future will unfold and refuses to do anything about it. He knows that Lisa will be raped by Frankie. He knows that she'll get pregnant. He knows that her asshole dad will disown her. He knows about the post office blast. He knows about the missed test result that will eventually kill her. He knows all this and does nothing to really help her because he can't abide a world in which a woman has agency. The idea is that if she knew things that could help her, she might leave him or something and he wouldn't get the girl he's supposed to have because he's a man and that's 'how things work'.
This leads us to what the problem Batiuk seems to have with women. After all, what is a woman to him? A woman is a mother who thinks that comic books are gaudy, juvenile trash that her son has to be made to outgrow so he can make a name for himself in the real world. A woman is a mother who thinks that being a cartoonist is a witless waste of talent and that a teacher is a figure of respect. A woman is a pretty girl who selfishly and cruelly fails to acknowledge that the best woman alive is lower than the lowest sort of man. A woman is thus someone who refuses to admit that he is entitled to her services because he's got a schlong and that's the deal. Since he prefers Lisa dead and dependent than alive and autonomous, Les Moore is thus a full-on villain protagonist.