Not true.
Rasenshuriken: Naruto had to train hard for this: He was working on something that couldn't be taught and was virtually impossible, but he succeeded through hard work.
Sage Mode: You saw all those statues that Pa told Naruto about? Those were dozens of people who came before him and failed, prooving Sage Mode is no walk in the park. Naruto worked for that.
KM/BM: you think Naruto just walked up to Kurama, asked for some power and Kurama said "K". No, he had to defeat his dark side, master taking chakra from Kurama without Kurama taking his own, defeat Kurama and train himself to effectively use Kurama's powers, all of which were not easy feats.
As for Sasuke, while most of his power didn't come through hard work, he certainly didn't get them for free. Several things had to happen to him, including insanity, being an enemy of the world, losing his entire family and life long loniless like Naruto and Gaara, and loss of his older brother. If those things didn't happen, Sasuke wouldn't be bearly as strong as he is now.
That's looking at the small details, if you look that way then look at every detail Itachi did, or heck, even Kabuto did because he also had to get the Sage Mode.
Like I said before, my biggest problem is Naruto's latest upgrades, the Sage Mode Naruto was epic, Rasenshuriken I've seen the episode and Naruto practiced hard aswell, but the others are utterly bullcrap.