American Psycho the book was written by a (closeted at the time) gay man where the book is simultaneously used to criticize American consumerism and as a way for the author to work through his drug addiction and self loathing of his gayness.
American Psycho the movie is directed by a women who focused the film on the absurd levels of shallow toxic masculinity that Patrick and his "friends" display.
The irony of course is that most of the real psychotics, and certainly the worst of them, are socialists. It's the people who claim to despise consumerism and capitalism who do all the actual killing, including of their close comrades.
I also think feeling an obligation to your family and your "capitalist" society and so therefore trying to get ahead in your chosen career being dismissed as "toxic masculinity" is especially hilarious - as if living in a blue tent, dressing as a woman, having gay sex so you can score meth, looting the local Walgreen's and fighting with the cops to gain validation from your Antifa friends was so much more healthy.
... the ultimate point is such a life style is just as devoid of meaning and impact as the rest of the non-murderous wallstreet rats ...
Because the only authentic life is a socialist one. I've heard this one too.
I have an "uncultured swine" take on why Patrick Bateman is viewed so positively. He has wealth, power and bitches at his disposal. Moreover he kills people who annoy him and get away with it. Forget the ideological nuances and the implied Leftist propaganda horseshit, which most people these days have long ago learned to ignore. Bateman is about getting what you want when you want it, and damn the consequences. For similar reasons gangster movies were popular in the 1930s.
Besides, the sort of people he kills are the very type of rich pretentious limousine liberal hypocrites who virtue signal about social justice for the common man over dinner at Dorsia. Who doesn't want to put an axe in the face of someone like that?