This film is a great cocktail made of Ukrainian and Japanese mass culture and popular stereotypes added to the shaker with all the Quentin Tarantino's filmography and shook well.
There are no reasons to comprehend it as a serious work. It's as absurd, silly and explosive as it is meant to be. There are no deep thoughts or well-written dramatic lines. But there is a great amount of colorful action scenes of a high quality and a lot of ludicrousness.
It is well-known fact, Tarantino is a master of hidden or not so hidden allusions, homages and replica scenes from a variety of other film directors of the past and present. True Quentin's works admirers will be happy to see the same principles applied in a production of this movie. The only difference is the fact all those scenes are from the Tarantino's films. The serfs owners resembles slaves owners from Django, Haydamaks resembles Jews Squadron from Inglorious Bastards, messing around with eastern fighting arts stereotypes is clearly an homage to Kill Bill. And so on. Good luck to find all of them.