I think that's a perfect example for the fact that this movie isn't for everyone. What Kyriakos criticises I see as some of its core strengths:
- The other characters couldn't be more fleshed out because of the narrative style: Which is third person limited. So fleshing out others would have been possible only by losing out on the development of the protagonist. The only time the movie actually leaves him is right at the end, when Thomas Wayne is killed. And that only to illustrate how the Jokers and Batmans origins were interlinked. All the rest of the movie the Joker was basically front and center.
- The same goes for the delusion. The movie went with realism over relatability. I actually had some trouble to buy into it, because I expected it to be a cheap action movie and the mental issues to be merely a plot point serving to get us to the action. When that didn't happen, I kinda experienced a 180° turn. "Holy... This movie is actually doing it?!"
So "something memorable" would have made it better for some but most certainly also much worse for me. - I stumbled over the 7 medications thing as well. Especially since it was right at the beginning of the movie. It's not the number of medications that make a difference, but the dosage. However, speaking in absolute numbers ("7") is far easier to understand than "50mg of Sertraline, 15mg of Ritaline, 25mg of diamaline". Such details are where realism can be a bit excessive and even detract from the actual point the movie was making, which was: Joker takes a lot of medicine. It doesn't help.
Quite honestly, I loved this movie for finally respecting me, the viewer, and not thinking of me like a total idiot. That's especially glorious given that the maker is the guy who made Hangover.
The plot really reminds me of Dostoyevskyi's the double: Which is also a story where you in third person limited follow a protagonist in his journey into ever more madness... Again: This from the guy who made Hangover?!
And the deeper twists on the overall story, with the Gotham universe turned upside down (the benevolent billionaire vs evil street thugs thing is kinda stupid) and Jokers story still being one of selfrealisation. He's become a homicidal maniac, but personally he's still become a freer and happier man. I love it.
Also note that the end somewhat implies that the entire plot of the movie was made up by him to that woman across the table (before she's presumably murdered and he walks out with red footprints). A good callback to Heath Ledger's Joker making up a different origin story every time he tells it.