When I was in middle school and the first Hunger Games movie came out, I remember that while everyone else was concerned with the whole Peeta versus Gale stuff, I was more concerned about other things excluded from the film, things that I thought were important. For me, the best part of the book The Hunger Games was the boy from District 10. He was never given a name, but for me, that really characterized all of the worldbuilding that I needed to know about Panem, the nation that would make a boy that could barely walk participate. Yes, it was awful that teenagers had to fight for the death, but the boy from District 10 was the part that really impacted me, as well as all the motifs relating to hunger. The movie left all of that out. Honestly, it didn't make it seem awful that all these teenagers were forced to fight until they all died, much less how hunger motivated them in playing along. I don't know why some things such as my example get excluded from films, like S