Various critics tried to decimate Joker as being flat, shallow, and unfit. Well, I wanted to judge for myself. The technical dimension - direction, acting, etc - is simply brilliant.
Yes the film is disturbing, but to me it mirrors sociological, psychological and cultural narratives which are prevalent in our times. From social isolation to crisis masculinity; From family life to bureaucracy; From unrest to violence; From mental health to showbiz; From triggers of deviance to crowd dynamics; From inequality to protest; To the creation and presentation of the self through one's encounters in personal assemblages within society.
So many readings can be given to this film, including whether it can be simulacra in itself. The bottom-line is that it offered (disturbing) entertainment.