Let's be honest. Kizaru may have won against EH Luffy, but he was pretty pathetic in that arc. Nothing he did made me think, "Wow, the Admirals sure are a cool bunch." So, TAC's curse did affect him.
Ngl you right.
Like I stan the man but Oda
really screwed us with that first fight, we got one measly clash or two between him and G4/G5
Meanwhile Kuzan gets a sick clash against Garp and we get to see how he trained his punching skills.
Kizaru we get some throwaway info on his defence. But we don't see how he trained, what his version of Ashigara Dokkoi is etc.
And in his fight with Luffy he never got any good moments of showcasing attacks or anything, so Oda definitely did him dirty there.