1) Sakura punching Naruto for being dumb/perverted
Remember that this is a shonen manga, and most, if not all, of these series seem to require a female character hitting male characters for the sake of humor.
Furthermore, the manga is not grounded in reality, and these exaggerated scenes are meant to be viewed in the same light as Gai's overreactions to Kakashi's "hipness," Iruka/Sarutobi/Ebisu/Jiraiya/[insert male character]'s massive nosebleeds when becoming victim to Perverted Jutsus, and of course Hinata's fainting every time she sees Naruto.
Finally, if you still can't get over these scenes; while the anime may make it seem as if Sakura makes a habit of beating the living daylights out of Naruto every other day, with all its fillers and omakes, you should know that it has only occured 2-4 times throughout the ENTIRETY of the post-timeskip manga.
2) Naruto/Hinata Opposites Attract
Well I could argue that the "opposites attract" theory has already been proven untrue through real life studies, I have already acknowledged the fact that this manga is not based off reality.
The thing is, though, that within the Narutoverse itself, this argument has also proved untrue for other cases.
Asuma and Kurenai are both calm, collected, and fairly confident individuals. Yet, they had stable, ongoing relationship that resulted in a child.
A fan favorite pairing, ShikaTema, consists of two characters that have both been shown to be calm, intelligent, analytical (as seen in their chuunin exam fight), and both have similar leadership qualities . While some may say that they are opposites since Shikamaru is lazy and Temari is...not, its a pretty weak contrast in itself and hardly classifies them as opposites.
3) Minato/Kushina parallels
Bad traits? Try reading that chapter again. Kushina was quite proud of her reputation as the Bloody Habanero. Moving on....
No parallell? Oh boy...
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I don't think much needs to be said here.
It's not that Sakura is clone of Kushina, but rather that Kushina was deliberately designed after Sakura in looks, personality, and, as much as I'd hate to say, damsel in distress roles. Yes, Kushina and Naruto are alike, and therefore Naruto is much like Sakura, but again, opposites attract does not necessarily hold true within the Narutoverse.
As for the Minato/Hinata comparison, I'm sorry to offend, but I really have to facepalm on that one.
Minato was not a shy person at all. He was easygoing yet confident, as shown by his dialogue in his fight with A and Killer Bee, and had the drive to become Hokage which he passed on to Naruto along with Kushina.
He was initially as shy and softspoken around Kushina as anybody would be around their crush.
BTW, I am glad you brought up GokuChi. Did you forget that Goku was quite the (naive) pervert as a child, and that in reaction to this, Chi-Chi would hit Goku? here's something to refresh your memory if you don't:
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Not to mention that when Chi-Chi grows older, she becomes quite the aggressive, violent woman herself, or did that also slip your memory?
If what you say about Kishimoto being heavily inspired by DBZ is true, then NaruSaku is almost bound to happen.
4) Fillers
First and foremost, its quite apparent you are rationalizing it in a biased way in order to support your opinion. Fillers are fillers and should never be considered evidence in an argument. As has been said of any anime adaptation, their sole purpose as standalone episodes is to lengthen the gap between the manga and anime, and fillers placed within episodes themselves are used to adjust the time of an episode so that it will fit the 21-23 minute time slot. They have no worth in a canon argument. Sorry if I put it too bluntly, but people citing fillers are my biggest pet peeve.
Second, to respond to your point that the animators wouldn't put NaruHina moments in there if it wasn't planned to end that way. I could easily say vice-versa, that animators wouldn't put any NaruSaku moments in fillers and movies if they didn't intend on having the series end that way.
You say that while NaruHina fillers should be considered at least paritally canon, while at the same time saying NaruSaku fillers such as the date in the movie should not count. That is bias at its best.
I could say something similarly biased such as "Since the movie was written directly by Kishimoto, while the NaruHina filler moments were not, NaruSaku is more canon."
So I think we should both agree, movies/fillers by definition should NOT EVER be used as evidence for one pairing or another being canon.
Finally,
5) Naruto saves Hinata romantically while Naruto is just saving Sakura along with a couple of other people
It's quite obvious to see that you have interpreted the scene in a way that supports your bias.
Let me explain the true objective purpose of this scene:
Kishimoto isn't stupid, he is well aware of the fact that there exists conflicts over the pairings. As discussion of pairings means increased discussion of the Naruto series (such as we are doing now), which means more poeple invested in seeing how the pairings turn in the end, which means more people following the manga to the very end, which means more $$$, he is quite intent on keeping the pairing wars going until the very end of the series, as is the logical thing to do.
This parallel scene of Naruto saving both Hinata and Sakura is the result of his intention to keep the pairing wars going, as he knows it will be discussed (again, such as we are doing right now).