So getting powercreeped by every following villain?
Lol
But really though:
> Both scaly
> Multiple transformations
> Known in universe as "the strongest"
> Abused a royal and killed his dad
> Pushed MC to his peak and force him to ascend to SSJ/G5
> Lose due to their own hubris
I feel like Oda wanted G5 to be his UI/SSJ and Kaido was his Frieza, hence why he's portrayed as a greedy conqueror and a suicidal battle knight at once.