Worthy Acting Performance By Phoenix Worth a Watch, but This Joker is Not Smart Enough to Become the Joker We've Come to Know

Rating: 6/10 (7 October 2019)

Here, we have a broken man whose mental instability and illness is the catalyst for what Arthur Fleck eventually becomes, but I mean nowhere in this movie do we witness any kind of intellectual prowess, high intelligence, or even any miniscule reference to his wit and smarts to believe he has what it takes to become the Joker from the previous films.
Also, there is merit to the theory that the whole entire movie was a dream playing out in his imagination, and he was conveying that to the psychiatrist the whole movie, which connects to the end since it starts with him meeting a psychiatrist and we know he was making things up by the revelations. In addition, there is no factuality to the idea that he was Thomas Wayne's lovechild. Joker is having a delusion of grandiose throughout the story, connecting himself to powerful people and situations, which would be a semi-trait of his narcissism, as well (although narcissism is far from his predominant psychological problems). I'd prefer this theory because it would explain why Fleck lacked any kind of pragmatism and intelligence we've come to expect throughout this movie.
The Joker is playing the psychotherapist the whole time, making her feel sympathy and bad for him (as well as the audience), and that's the joke on her at the end, which enables him to kill her, too. This is Joker's own fantasy origin story, which has little validity.
Go ahead and downvote, but there's no way this take on the Joker is intelligent and mentally competent enough to become Ledger's Joker.