This film has too many adult themes for young people
I have been reading this forum and it seems so many of themes about parents and children and justice are difficult to follow for people. I have also seen how there is a difficulty in understanding why the FBI and the Sheriff's department work the way they do in the film. Oddly, all these factors are blamed as plot holes or bad direction.
I'm actually very shocked that extremely basic points in the film are difficult for people to follow. I can understand how the Father/Son Family themes are difficult but the FBI and witness protection themes are pretty well explained throughout the film.
I think if you found it a tough watch come back to it in 5 or 10 years time. It's a very simple film to follow, very well directed and scripted as well.