I'm not going to answer about everything not because I don't have arguments but rather because I'm lazy.
1) Yes Naruto gave chakra to Sasuke but merely to take him out of Obito's "cage", like he did with the rest of the alliance. That however does not prove inferiority. It's not like he needed naruto's power to survive. He had pointed out his back-up scenario to use his animal contract to get out, much like he did with Deidara. The difference between naruto's solution and his is that while with naruto's way everyone got saved, Sasuke would have saved himself, Juugo and Naruto, if the latter had accepted. Nonetheless, he would have survived on his own. You suggest that he wouldn't manage to do that.
2) So according to you, naruto's ability to infuse Bijuu's chakra in his own technques as well as his black balls and his abilty to melt ice is something that he could do prior to his meet with hagoromo? lol okay.
3) Yes, against Kaguya naruto did manage to do way better than Sasuke, however that alone does not prove "huge superiority", it has a lot to do with who fights who. Besides,it's also clear that Sasuke was holding back because he was planning to fight against naruto later. You may have a different opinion, perfectly acceptable.
4) In this fight, nothing indicates that Sasuke was losing, yes Naruto's sentence seems to indicate that but it's just naruto's words, till I see him overwhelming Sasuke, I won't go with his words. Show me where exactly he does not hold his own ground, was there a moment that Naruto pushed him too much and I can't see it? Also, as for Naruto, "he's only using taijutsu and sensing". Lol he's my favourite character but fanboys really annoy me. So, the fact that Kurama gave him shitloads of chakra as well as the fact that it was Kurama who gathered all that sage chakra count for nothing? Whatever you say XD
As for what you said about Naruto's tremendous power, I won't agree but I will point out that things take this way now because Kishi wants to point out that people are wiling to give you their full power in a much more effective way if they don't do it by force. In our case, Sasuke forced the Biuu while in Naruto's case, they did it on their own accord.