I loved it, but I took it to be a black comedy. It's like American Psycho,(actually if there ever was a new more faithful and violent adaptation of AP the director Coralie Fargeat would be a great choice).
That Phoenix branding scene really cracked me up. Perhaps some people were taking the movie too seriously.
I wonder though why was the movie set in Mexico when it was actually filmed in Morocco?
"I prefer reading to writing. Reading changes your worldview. Writing changes absolutely nothing. Except, of course, when it makes you rich." Michel Houellebecq