Yet another teenage dystopian fairy-tale

Rating: 2/10 (1 April 2017)

Our teenage female heroine is Tris. Like most adolescents she needs to be part of a group, establishing at the same time that she is much superior to her peers.
In her society people are conveniently divided in 5 factions (actually, 6), according to virtues: Abnegation, Amity, Candor, Dauntless and Erudite (plus the factionless, the pariah of the new society). At a certain age, teenagers must decide which faction to join, regardless of the faction of origin. They are previously tested to establish their main trait and make a better choice about the faction to choose.
Choices outside their birth faction are frowned upon, but still allow for the protection of belonging to faction. Not so easy for Tris. She is "special", therefore a threat to society because she thinks "independently" - whatever that means.
Those like her are called "Divergent" and are the object of a secret witch hunt. So Tris must succeed her initiation in the adult world, while hiding her true self.
It could have been a mildly interesting story, but there are too many problems, both with the plot and the filming. What of the factionless? Are they also divergent or just lazy misfits? Why nobody seems to care about this main issue of their society? Isn't the elimination of the "divergents" too radical a way to deal with an alleged problem?
Finally, instead of developing a comprehensive plot, half of this very long movie is devoted to Tris' initiation into the Dauntless faction. Scene after scene are about her tests and trials moving the plot nowhere, except for the introduction of a dumb love story.
Targeted to the same audience of The Hunger Game, this is yet another movie that made me check the time more than once. It drags along forever and the ending is so open and silly that one can hear it screaming out loud for a sequel.