Justin Hullinger’s review published on Letterboxd:
This is the movie. This is the movie that ends any and all attempts I’m going to make to get into the DC Extended Universe. Batman V Superman was kind of like a fascinating trainwreck, and did get a little better with the Ultimate Cut or Extended Edition or whatever the hell they want to call it, but this is a whole different kind of bad.
I wouldn’t be surprised if this movie had a major overhaul in its tone, given the fact that DC seems to think everyone’s problem with Batman V Superman was its dark tone (apparently they’re fine with the convoluted plot with more holes than Dunkin Donuts at rush hour). The trailers went from somber, dark, and ominous to colorful, joke-filled, and with a classic rock soundtrack. I’m guessing part of the problem here is that they filmed scenes for a darker movie and tried to lighten it up with pick-up shots and editing.
While I’m on the subject, the soundtrack to this movie was driving me up a wall. I have no problem with a film relying heavily on licensed music (the masters being Scorsese and Tarantino), but this movie is just so uninspired in its choices. Painfully obvious tracks by AC/DC, Black Sabbath, Queen, Creedence Clearwater Revival, and others make it feel like the movie was partially funded by a classic rock radio station.
Without a doubt, the best thing in Suicide Squad, which happens to be the only good thing in the movie, are the scenes that focus on the relationship between The Joker and his puddin’, Harley Quinn. Jared Leto and Margot Robbie are easily the two standouts in the movie (Will Smith mostly plays the same character he plays in every movie and Jai Courtney plays Australia Man), and every time the movie pulls you away from the two of them to deal with the rest of this trash heap it's more painful than leaving your warm bed on a cold winter morning. I would have been so much happier had this movie been just about Harley and Joker in a sort of Bonnie And Clyde “us against the world” sort of routine. Instead, she has to share the spotlight with weaker characters, and The Joker is pushed so far into the back of the crowd you can barely see him.
Just a major disappointment from beginning to end. A large cast of characters that the movie does really try to make you care for, and a villain that’s thinly written and surrounded by cheap special effects.