Very well spot on.
Kaido should have been a humanoid dragon who ate "Hito Hito no Mi, Model: Shutendoji" and it should have been hyped as "the darkest Zoan fruit", so we understand why his dragon form is his weakest form and we got something like this:
And, instead of generic fire breath, this DF should also have allowed him to manipulate Dark Matter, so his kanabo and his beams are made of Dark Matter. All of this would have made him fucking deadly and capable of destroying even the world.
Instead, Oda made it his personal mission to embarass the Beast Pirates in their own arc, and now here we are.