Shadow Clone: Naruo had to train for hours? WOW, this is a jounin level technique he really shouldn't of been able to do it at all, especially since he couldn't even do the regular clone jutsu. It makes no sense. If he was a random kid with no talent he might not have ever been able to do this technique let alone learn it in a few hours. This technique should probably take weeks or even months to learn for average shinobi. Yet Naruto learns it in a couple hours.
Rasengan: The technique did not take "ample time" Naruto learned it in a week, Naruto MASTERED shape manipulation in a week something only 5 people in the entire series has done and he did it faster than everyone. Even the supposed genius Sasuke hasn't been shown to have this level of mastery of shape manipulation.
Sage Mode: He fully mastered it, unlike Jiraiya, and his genius father Minato, which proves Naruto's talent in sage techniques trumps Jiraiyas and Minato's but Naruto isn't a genius?
Ashura: Ashura always had the same potential as Indra even Hagoromo said that after he finished training, he awakened a power EQUAL to his brothers, it's like the characters in this manga and the people on these forums don't understand the concept of a late bloomer. Just because you are a late bloomer doesn't mean you are not a genius. Naruto/Ashura are late bloomers they have slow starts, but once they train a little bit their full potential comes out and they start surpassing eveyone around them.
You are confused between what Kishi is telling us and what he is showing us. Kishi tells us Naruto is a no talent loser who will have to work extremely hard for everything he will get in life. Kishi Shows us Naruto mastering jutsu's and skills much faster than the people who came before him and his peers, and he takes those skills to level's even the genius's couldn't hope to accomplish yet kishi wants us to believe that Naruto isn't a genius? Yeah, right. If Kishi really wanted to tell an hardworking underdog story Rock Lee should have been the protagonist. Or Naruto should of had the same handicaps as Lee then i would believe it.