Speed does not allow you to dodge everything. You can not dodge what you can not see. A thunderclap would put him down for a while. This same Hulk is releasing shitloads of gamma rays. Heating up the entire area. He can clap and take out a nice chunk of this planet. Midora, didn't die instantly by this attack. And Hulk has feats that would argue, he would out beat this very ability. He's not dying instantly, he'll be able to continue fighting.
This is the same Hulk who stepped on the 50ft dragon.
Including all of his crazy strength feats added with his new size, he'll be a bitch to kill in this fight. Just being near him means death.
Difference between Midora and Hulk though is thanks to his mimicry cells, Midora was able to copy Minority World and invent Hungry Space, and was able to reverse the effects of Minority World. Also, the other thing you're misunderstanding is that it only does internal organ damage, but you forget that it quite quickly slows the body, makes the user unable to perceive their target well and soon stop the body completely, the signals the brain is trying to send only for them to be blocked, so while he may still radiate off his body, he won't be able to move. In fact, Minority World would also stop his healing factor, since the majority of his cells would try to regenerate, the minority would take over and stop it from doing so. So if he wanted, he could also pierce him through the head with chopstick once the healing factor is paralyzed. Also, fifty feet is a small size in the Toriko world, although considering that's hulk that would be a different story as well :P