When you see what Alex endures on a daily basis and imagine yourself in his shoes, it becomes starkly evident how bullying would make any kid want to avoid school or do something even more drastic to end their suffering, and why it's vital that we make our schools bully-free environments.
When I go to a movie, I want to enjoy it. Critiquing it isn't my goal. So I focus mostly on what works, because that's what makes or breaks the experience. If the good parts don't match your taste, why worry about the nuances?