This review may contain spoilers. I can handle the truth.
I didn't really expect a happy ending, considering the tragic way that pushed the story to begin with. Tim losing the race was ok. He could've overcome the bullies and finish the race at #1 anyway, but at that moment I believed the screenwriter meant to finish with a long term conclusion, something like "he will deal with his inner demons and then he will try again and beat his bully" or whatever. All the gears were in motion.