There's a few things that I find wrong but this is my opinion as someone who read the books and waited a few years for this film.
Tris is a divergent the whole film is focused around her, however her acting was unfortunately in my opinion poor she just seemed like she looked confused most of the time and she didn't really have much fluctuation in her voice to convey proper emotion. Also not a single person looks their age but then again it's like that in most high school films.
This movie mostly felt like a mish mash of scenes as opposed to them making sense and having a good flow.
We are all divergent but Tris doesn't seem to convey that very well throughout the film. She just seems like an extremely confused individual you cannot connect with as a viewer. Take this as you will though!