Hughton did not shirk his share of the responsibility for the heavy loss.
He said: "We all let the club down. I am the manager and I pick the team and determine the tactics.
"We have a support who have travelled up to Manchester in midweek, to United, almost 3,000, and travelled back up.
"We very much let them down but they are a wonderful support.
"They would have been entitled to be on their way back to Norwich way before that final whistle went."
The Canaries have just eight points from 10 games and on the scrutiny of his own position, Hughton said: "I have always had confidence in my ability and in the group of players in the dressing room, but we need to address this one quickly.
"It is early in the season but I know we are on the back of a very heavy defeat. We have to bounce back."
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