Wow the good souls that want to protect us are wringing hands over Joker but
Gone Girl is a Men's Right Activist wet dream

That's probably reading too much into it but honestly it rubbed me the wrong way like some the Fincher films do (Millenium was by far the worst, but to be fair I've been told the story being super shit owed something to the book too). The fetishism over the (mostly mythical) super human serial killer paired with the slick but sometimes sterile esthetic is really a throwback to those bland "erotic" thrillers with somewhat conservative lessons starring Michael Douglas upgraded to current day plastics, Gone Girl even has some weird classist turns to it... Or in short it's Basic Instinct but without the playful, sarcastic vulgarity... and there's something jarring about the classy visuals (though what the fuck with those shit fade to black) being the vehicle for a story that isn't as smart as it seems to think it is. I also thought it lost some steam in the last third. It's very artificial and it loses some of that human grip that comes with abduction stories, the doubt, the research efforts...
I'll probably never know if Fincher is admirably intelligent or a sophisticated image maker that sometimes strike gold "by accident"
à la Ridley Scott.
Edit : Based on a book written by a woman, so you know, take my hot take with a pinch of salt.