10 Problems With Spider-Man Nobody Wants To Admit
6. Everything's Been Boned Since One More Day
Not that Slott should shoulder the blame completely for Spider-Man being a shadow of his former self. After all, he's been pretty much broken ever since the extricable retcon of One More Day, a storyline instigated by then-editor-in-chief Joe Quesada.
You see, Quesada personally didn't think much of a grown-up Peter Parker married to Mary Jane. He thought it aged him, made the character boring. Quesada, presumably, doesn't think there's much drama or conflict to be found in a marriage (which, good for him, or something, if he's married).
He long wanted to break the couple up, but knew that having them get divorced or something would be equally poisonous - in his mind - to having them married. The only thing worse than Spidey in holy matrimony is Spidey in a divorce case.
So at his behest, the worst Spider-Man comic in history, where Peter and MJ sell their marriage to the devil so Aunt May won't die, was created. Which retconned their marriage so it never happened, and also so Spidey didn't reveal his secret identity during the events of Civil War. The new status quo was never quite properly established, and none of the characters have ever quite recovered from this totally idiotic comic book.