Yannick Sagbo was sent off in the first half, but Norwich failed to take advantage and Hughton said after the game that his side must be more ruthless.
"This league is too unforgiving," he told FourFourTwo. "There's too much quality and everybody's fighting. You have a Hull side down to 10 men that are fighting for their lives, you have to expect that in every game.
"If we come away from here and it's a 0-0 scoreline then you come away from here certainly happier.
"We gave away possession far too easily at times against a team that were at home, that were under pressure and made it difficult."
Norwich face Bury at home in the League Cup on Tuesday, before welcoming Southampton to Carrow Road next Saturday.