John Kelly’s review published on Letterboxd:
If you'd just shown me the last, say, 15 minutes of this film, I'd have said this was a perfectly fine Joker origin story and I'd be giving this probably four stars. Instead, we've got another 107 minutes of unnecessary context that reveals Joker to be a singularly boring and pathetic figure in, let's not forget, the DC cinematic universe.
At least they're being consistent, though. I can see exactly how Snyder's dickhead Batman fits in with this.