Wrong. Itachi survived thanks to his final Susanoo, not the skeletal one. Itachi wasn't suicidal enough to take the risk in not using his full defense against the attack
Ribcage is the fastest susano'o to bring out. Anything above ribcage takes time. A good example of this is PS needing to stabalize, or that mask thing that has to slowly cover up V2's head. Itachi couldn't have brought out his final susano'o in 0.001 seconds. It's just not feasible no matter how you try to force it. The fact that it's ribcage which appeared there after, and not his final susano'o simply confirms this.
Ribcage Susano'o has shown to tank Kirin, chou odama Rasengan, Liger bomb.
V3 susano'o was shown to tank Hirudora, Byakugo punch, Super aggravated rock punch, Juubi's storm
V4 Susano'o was shown to tank a TBB
The mere fact that the 3rd raikage tanked a Rasenshuriken is enough evidence to support that it's feat are blown way out of proportion by it's fans, and that it will not penetrate even a ribcage susano'o <--- Thi ssupported by the fact that Madara had to be pulled out of his Ribcage to be affected by a rasenshuriken.
Thus far, there is no evidence in the manga to support any form of rasengan breaking a V2 susano'o, let alone V4. Any other claim is absurd and completely fanbased. Naruto's only hope is to tunnel his chakra arms below ground and hit susano'o from underneath, but this is also defeated by the fact that the EMS see's chakra through solid objects therefore allowing sasuke ample time to form a defence; If only that being to sit atop Aoda. There's no way KCM naruto pushes EMS Sasuke past Mid. Rasenshuriken isn't busting a Ribcage susano'o, and Chou Rasenshuriken isn't busting a V3, let alone a V4.
at best, naruto can cut a hole in Susano'o with his chou rasenshuriken, but that's assuming sasuke doesn't simply and effortlessly shoot down all incoming rasenshuriken with Enton magatamas.
Kirin is natural lightning. Yata only repels elemental attacks according to hype, so even by hype, it shouldn't be able to repel natural lightning coming from outside environment(not made of elemental chakra). And even if it could, it is highly likely it's only an hyperbole. To which extent this actual hyperbole is valid is unknown by us, so there is actually no proof it could have repel it like you claim
Another false claim made by naruto fans and itachi haters. An explosive tag attached to a kunai is completely natural. A kunai is made of natural metal; The tags are made of natural materials to produce an explosive; The fire from the explosion is natural fire. All of this is completely natural and has nothing to do with chakra, yet yata effortlessly repelled them. The claim that yata's hype is probably a hyperbole is just another excuse Itachi haters make. The mere fact that
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tanked a storm like this (filled with natural lightning and vortexes ) which completely destroyed the ground around his susano'o, just makes the claim that 1 bolt of lightning not only shattered yata, but also shattered Itachi's final susano'o. It's clear that it was Ribcage which sustained the power of that bolt of lightning, and hence why itachi took some minor damage.