I am going to be the one to say it. A lot of you are very very stupid, no offense.
Now with all of that said none of you who are complaining about Naruto has a credible reason why he should have lost besides saying Plot no Jutsu. A good plot is what makes a good turn around in the story, you need them, you want them.
1. Naruto in SM was stronger physically than any of Nagato's Paths and none of you can say otherwise. It is not like they were gonna draw blood or even really get close to really hitting him while in Sage Mode because he is too strong and too fast. Then you have to think about how Jiraiya was tearing the Paths a new hole. He went there to figure out Pain's secrets and in figuring it all that out he took out 3 paths and figured it all out too late.
2. Yes Naruto had some Intel but would any of you want Jiraiya's death to be in vain and not help out his billage that he was fighting for?? Umm no so you can't blame Naruto for having intel that helped him win the fight and keep so many other people alive.
3. How are any of you whining about Naruto going 6 tails?? It wasn't luck and he wasn't just out looking for Kurama to help him from the start or end of the fight. He was young(16) and fighting at the time the most powerful Shinobi, that is stressful for anyone. So how would you expect him to act when the girl who he secretly loves looks like she is dead?? He already had pain from the death of Jiraiya and Hinata getting hurt just sealed the deal. He was lost and needed help and was all alone out there. Kurama as devious as he was took the advantage of that opportunity. Yes it was a PLOT TURN but it was a great one because we got to see; the feelings Naruto has for Hinata, how lost Naruto really was fighting at such a young age, Kurama dedication to get free, his father's wishes & story, and his mothers love.
4. Then I hear everyone whining about after the Chibaku Tensei that Naruto was suppose to lose. HOW?? Naruto finally found some peace within himself and became a Sage once again which Nagato already was having a problem with matching Naruto physically.
5. It was nice to see Naruto defeat Pain in his base mode which too me was very iconic by him defeating Pain with his father's powerful jutsu.
P.S We have seen how powerful Naruto could get when he fused Sage Mode with Kurama's Chakra and it was awesomly. Naruto was very confident that he was able to destroy both Nagato and Konan in an instant. Now just like all the what ifs for Nagato. What if Naruto had that peace or whatever he had in order to fuse into something 5x more powerful than both of the transformations together that he went though at the beginning of the fight??