What does the success of Joker say about our culture? Not much.
Joker has earned around $650 million dollars which puts it above It: Chapter Two and in the same range as Justice League ($659 million), Man of Steel ($668 million), Suicide Squad ($745 million) and Wonder Woman ($821 million). It has earned two thirds of that outside of the United States. The American audience was around 64% male and 66% under the age of 35 and was racially diverse with blacks and Hispanics as likely to see the movie as Whites.
In spite of the hysterical moral panic in the mainstream media, there have been no incel mass shootings inspired by Joker only bad hot takes. It was just a movie that was an interesting character portrait of a psychotic clown that has been around since the 1940s. Heath Ledger’s portrayal of the Joker in The Dark Knight in 2008 earned over a billion dollars.