John Wick makes an entire movie out of the concept of a badass massacring a bunch of mooks over a dog
Hype Backlash: The fandom tends to talk this movie up quite a lot, which can leave new viewers somewhat underwhelmed by the Orwell-lite storytelling and over-the-top gunplay, particularly after far more grounded and realistic action movies had supplanted the exaggeratedly stylized "cool" stuntwork exemplified by this film.
Jerkass Woobie: Mary O' Brien, who comes off as overemotional. She is so unstable and violent that the Tetragrammaton Council may have a point about emotions being dangerous.
They're burning a painting? Make it the (original) Mona Lisa! Man stumbles for the first time on music? The Ninth Symphony! Just imagine how the movie would've progressed if he'd found a Philip Glass record instead.
Averted with "He Wishes For The Cloths Of Heaven", the Yeats poem Partridge reads. The common reference for Yeats would be "The Second Coming".
Special Effects Failure: The face-cutting scene looks as believable as some early Flash/CGI animation. Worse, if you look closely when Preston leaves the room, you can actually see Brandt's face on the floor; it's clearly a photo printed on a piece of paper. (Also, in the photo, he's smiling).
Tear Jerker: Mary O' Brien's execution. And John Preston can't do anything except remorsefully watching the entire cremation.
The scene when Brandt orders to the soldiers to exterminate the dogs in the fence is particularly difficult to watch. Especially for the animal lovers.
Vindicated by History: Was not especially well-received upon its initial release, garnering generally unfavorable reviews and failing to make a dent at the box office. Years later, especially in the wake of the recent surge in popularity of Dystopian fiction thanks to stories like The Hunger Games, the film is much more popular, with its Gun Kata in particular being imitated by countless shows and video games. It also started getting more recognition from anime fans around ten years after its release after Gen Urobuchi became a big name in the industry as he happens to be a huge fan of this movie, to the point that its influence can be seen in several of his most famous works such as Psycho-Pass and Puella Magi Madoka Magica.