I don’t even know what to tell you guys at this point
This entire Luffy vs Kizaru fight so far has seriously reinforced everything Admiral fans have been saying for a decade.
Yonko fans have continuously predicted, for months now, and on a chapter by chapter basis, that Luffy was about to roll Kizaru like a joint and defeat him.
Not only is this not even close what has happened so far, the opposite has happened: Kizaru is literally trolling the strongest Yonko in a fight.
First, let’s get something straight about Luffy:
Luffy is very much fully exerting himself against Kizaru is, as he always does for everything, by his own words.
Luffy also says Gear 5 is the peak of what he can do:
This is an extremely platitudinous argument.
For one: We don't see Luffy use ACoC on Kizaru in Snakeman or G5, and you can't prove that he did as we don't even see any lightning for the most part.
For two: Well that's about it, Idk what to tell you, we don't see him use Advanced Haki (outside of possible ACoA and maybe some FS), so he wasn't going all out.
Luffy is very much fully exerting himself against Kizaru is, as he always does for everything, by his own words.
Luffy also says Gear 5 is the peak of what he can do:
I think the only possible way to interpret this scene here is that this was Luffy using AdCoC now. Luffy doesn’t hold back or restrain himself by his own words, and yet Kizaru blocked this shit easily:
Which isn’t even far fetched, I mean AdCoC couldn’t injure Ryokugyu or Kuzan with free hits on them, so world’s strongest defense Kizaru should be able to block this nonsense with ease.
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Even if you claim it's ACoC (even though the lines are too thin), this is just base Luffy and he's not using Armament.
Also, Aramaki literally screamed and started holding his head from the attack, and then complimented her Haki:
So I'd say it did hurt him, just not enough to crush his skull or anything.
And if they both used CoC or ACoC here... Where's the sky split?
Oda always draws sky splits when two top tiers clash with CoC Haki.
Unless he just forgot to for some reason?
But even besides that, we clearly see that BOTH Kuzan and Garp are banged up from their hits on each other, so there's no excuse for this (refer to the image below).
Though you would be correct that they can "tank" ACoC hits, to a degree, as Kuzan and Aramaki weren't too damaged, but they were clearly still damaged.
Anyway
Alright so let’s get on to Kizaru trolling Gear 5:
This is the hardest I’ve ever seen Kizaru troll lmfao. Just look at his face, that is the exact definition of a complete troll.
I mean what do I even need to say about this lmfao???? This is the hardest troll energy I have seen in this manga. Even Buggy the fucking Clown doesn’t troll like this, Buggy just sort of accidentally falls upwards. Kizaru is literally flying toward the sea with his arms crossed not giving a fuck.
Kizaru can fly. There's no reason for him to be worried.
One: Him grabbing Usopp doesn't really mean anything. Even the most adamant Admiral haters and trolls knew Kizaru >>>>>> Usopp.
Two: Obviously the lasers are going to be hot, we literally see Luffy get charred by a laser barrier twice last chapter, but he still takes the barrage of lasers here pretty easily.
And I might not be looking at it right, but there's nothing of note in the part of Luffy's face that you circled at the top.
Also, Luffy's literally talking casually and deflecting the lasers there, so I'm not sure how that really hurt him or how it was supposed to be strenuous for him.