There’s something familiar about the deeper theme in “Joker.” It follows a character who is a victim of his own kindness, who is cast out and rejected by the world as it is, and in his isolation becomes a parody of society’s downfall.
He is eaten away by his expectations that the people around him should be kind and courteous. So he gives up, and in his disappointment follows the restlessness brooding beneath society’s façade, where he fuels the growing flames.