Whatever you're smoking must be some good stuff, because it's simply NOT TRUE. The last ten years, heck, 20 years, disproves this exact statement. No, Spider-Man's villains may not be overly complex compared to others in comics, but they are rightfully complex as characters in relation to Spider-Man.
Frankly, bringing up the movies as evidence is almost insulting, knowing the history behind these characters extended far before that. So that's out the window for sure.