Not a great superhero movie, but also not a bad one

Rating: 7/10 (2 January 2019)

Note: This review is for the extended version, not the theatrical version.
This movie probably would have been more enjoyable as a high-budget TV series. The biggest issue with this film is that it feels rushed, even in the extended version. The team members go from "every man for himself" to "I'm willing to give up everything for my teammates" far too quickly to be believable. I feel like they were quite successful in giving most of the characters ample time for background development, but they simply did not have enough time to convincingly unify the members into a team that is willing to work together.
On overall aspects, I felt the intro words for each character were too fast with too many words on screen. Some jokes were good, while others fell flat. I didn't have an issue with the music as other reviewers seem to have.
I'd like to go through the main characters next:
Deadshot - Easily the best thing about this movie, and I can see why they are considering a solo film for him. In a team of crazies, it's good to have a relatable character to ground the film.
Killer Croc - Although I wish they had used CGI to make him closer to his true size, the character was done very well for what he is.
Harley Quinn - Also done well, although I never saw anything quite crazy enough or relatable enough to make her a primary character. And a couple of the jokes they gave her were quite bad.
The Joker - This is every comic fan's biggest complaint, so I'll start with something positive. Jared Leto actually performed the part well with what little he was given. His scenes and dialogue had little going on, but he managed to draw it out to keep it interesting. It's obvious that this film wanted a different direction for The Joker than previously shown on screen, and it appears this movie aimed for "disturbing" to be the primary description. In that, they were very successful. I almost wanted to look away every time he was on screen. Even his distinctive laugh was changed for this film, and the result was quite unsettling. I believe many viewers might have misinterpreted their dislike for the character as Leto's poor acting, but that is simply not the case; the audience was not intended to like him. While Leto can be forgiven, other fundamental changes to the iconic villain are unacceptable. The Joker is presented as a typical gangster. Aside from dressing strangely and forcing his minions to do the same, there is never anything really bizarre or terrifying enough to make him a convincing Joker. But the worst part was his interactions with Harley. Harley's love for The Joker is supposed to not be reciprocated. This is actually shown well in several scenes, but then counteracted by The Joker wanting to help her escape. They should have given The Joker some selfish motive for saving her rather than his implied love for her.
Diablo, Rick Flagg, and Katana - As minor characters, they are still given fairly relatable backgrounds, although Katana less so than the other two.
Captain Boomerang - He was given very little background and zero emotional scenes. I honestly felt that he didn't belong in the movie aside from one or two scenes that made me laugh. When he was given a chance at freedom, I see no reason at all why he decides to stick with the team.
The Witch and the villain - These characters are very unrelatable, but I can forgive that since they are attempting to make so many other characters relatable to the audience.