The entire theme of the story was flipped on it's head for this ending.
What started as a story where the main character defended human dignity, natural rights of all people, and the right for people to dream big dreams that they have a right to try to achieve ended with the exact opposite ideal.
1. Naruto, Sasuke, and Hinata are the "chosen ones" who had to live up to their destiny/fate. Just as Neji argued in part 1.
2. Because Sasuke is one of the choose people he can not be punished for his deeds. In fact he is rewarded, and in the end is shown to be above other people. Most of Akatsuki died for their evil, or worse (Hidan is an immortal living no as just a head buried under tons of rubble) well Sasuke (precious Sasuke) is not only given the girl, he has a child, an essentially is rewarded despite the fact that he is a terrorist, a murder, and a man who tried to set up a fascist dictatorship over the world with him as leader. Why? Because unlike the other evil members of Akatsuki he's a chosen one. It's not his destiny to be punished.
3. People don't fight to reach their goals, they are rewarded for following their destiny. Naruto pushes two other solid leaders aside so he can become Hokage, because he is destined to becoming Hokage. Despite the fact that essentially at this point there is no reason for the Village to still be under the rule of a military dictatorship. Hinata get's Naruto's kitten because she deserves it, and as the movie shows, was destined to because she came from the right family and had great power in her from the beginning that was destined to be hers. Then there is poor Sakura, who is the image of the modern battered housewife, who is unable to ever change her mind on who her mate should be because she once as a kid said she had a crush on a man who eventually tried killing her multiple times, and mentally tortured her. Not only that but she forgives him after he simply says "...yeah...sorry." and automatically tries to get in his pants. Why? Because she is destined to she doesn't have a choice in the matter anymore after she made her first choice.
So in the end we have a world that is created by fate. The man person who got punished in the end... was Neji the heretic who defied fate after taking up Naruto part 1's ideals of individual self worth and free will. Despite the fact the Neji was originally the one who was aligned with the ideals of fatalism. Why? Because he must dies so Hinata gets a chance to have a connection with Naruto.
Kishimoto is a hack. He is a horrible creator, and just a bad writer.