The problem is exactly that...He didnt shown anything....
Perhaps because he was not capable of showing anything against Kaido.
When it comes to AP, Kidd is losing even to his man Killer...No wonder everyone threats most Kidd fans like clowns, you all have nothing on your arguments but senseless headcannons about "but in sabaody Kidd was portrayed as Luffy rival" BS.
Kidd might do shit against big meme, a lot of characters already have LOL, but nothing he can do will be comparable to what Zoro did vs big mom and Kaido....Unless you realy believe he can win against big mom in a 1v1 when Luffy just got his ass handed to him vs Kaido, now THATS some wishfull thinking.