They all have much larger nationwide fan bases from which to draw support. You can't compare those clubs with us.
As for all this negativity of the population that you mention, in my view Hull is no worse or no better then any other city or large town in the country in this respect.
Every place has it's whingers.....
So why would Norwich, Leicester, Derby, Southampton etc have sold out straight away?
As for negativity, you don't find the amount of whingers in other places we have. And certainly not the amount of people who actually want their local football club to fail. Although a lot of that in Hull is down to jealous eggchasers, many of whom support a football club from another city.