Admirals have already had multiple ycs gang up on them to no avail and required an entire yonko crew (minus the yonko) to stalemate them.
First of all, first image doesnt prove anything. Katakuri too was evading Luffy G4 Boundman easily. Is Katakuri stronger than Luffy? No, they are in the same tier but Katakuri surpasses his speed via his Advanced CoO.
Here with Akainu we can say the same and Vista is not even Admiral lvl.
The point is, that scan does not prove anything. And comparing that situation with the one with Kaido makes no sense, totally diferent.
And about the second scan. Is there any scan of Akainu fightning with all of them? No.
There is only the clash with Marco after that scan, and later, we see that he defeated Curiel. But what happened with the rest of commanders after that? Unscatched (no more visible wounds or any burns for example) and they were not even around Akainu's place anymore.
That scan is for epicness and for stopping Akainu who was going for Luffy. They did it and probably some of them remained fightning with him, Curiel at least.
Just after Akainu defeated Curiel, Coby appears and I only see the commander who can set fire on his sword in that area:
https://s2.mangabeast01.com/manga/One-Piece/0579-011.png
https://s2.mangabeast01.com/manga/One-Piece/0579-012.png
And Akainu is not alone btw, he has backup from Navy soldiers behind him.
So like the other, this scan does not prove anything and situations are totally different from the one with Kaido.