“Joker: Folie à Deux” is a misguided mess that squanders its potential. The plot is disjointed and aimless, failing to build on the psychological depth of the first film. Joaquin Phoenix’s performance feels tiresome rather than transformative, and the forced musical elements come off as absurd rather than innovative. The film’s attempts at depth are shallow, leaving audiences frustrated and disengaged. Overall, it feels like a hollow cash grab rather than a meaningful continuation of the story.