Who was the most hated fighter of all-time?

[Dark Lord Al]

for me heres the top 3

Calzaghe.
Hamed.
Steve Robinson.

Calzaghe the most hated of all time?... Why?

It's not the fighters that YOU hate the most... It's fighters hated severely by many over history.

Or do you just personally hate him so much that that it makes up for the tens of 1000s who hated Ali etc more?

You hit the nail on the head with all three of my choices.
but i also couldnt stand Clay either.