Hughton admitted that his first top-flight game in 20 months could not have gone worse.
"It was an awful day for us," Hughton said. "That's not how you want your first game of the season to go.
"Four of the goals were avoidable. In pre-season we have looked very solid in defence. I had no inkling this would happen."
Hughton is confident that his men will bounce back from the thrashing, however.
"The players are hurting," the former Birmingham manager said. "This won't be the only defeat that we will have and it won't be the only defeat that we will have by a few goals, but the players will want to react well.
"They know this wasn't acceptable today and they want to make amends."