I wonder how much "dumbing down" of games comes out of the deep frustration of writers/developers watching players/reviewers insistently miss the point over and over again.
Not just games, though. I've seen reviews of authors whose works got much more Anvilicious as they went along. Part of me is wondering if that comes out of the little voices in their heads screaming "FOR GOODNESS SAKE I AM TRYING TO SAY THAT MISOGYNY IS BAD!" to people who Just Don't Get It.