I don't know the reason behind all the critique. Its gruesome as it's supposed to be and has some dark humor. The acting was displayed magnificently in my opinion and the brutality in the movie was epic. It is everything I want in a thriller. I'm not a psycho but the suspense and gore were amazing. It made me feel like a psychopath because I genuinely enjoyed the movie. It made me laugh and cringe away from some scenes but it was so entertaining. I loved it. I guess if you don't like it you just don't have the same taste in humor and thrill as me. Overall its a 9/10 from me.