Luffy is not taking Kizauri seriiously at all. Not using Addvamced CoC Haki. Luffy is not even trying to fight kizaru.
He had him in his hand. He could crush him and activate advanced CoC + advanced CoA Internal destruction and kill him just like that, but then choses to throw him.
Makes no sense what Luffy is doing. KIZARU HAS HEAVY PiS from.Oda.