Hughes was taken aback by the margin of victory but was keen not to pick out any player for particular criticism.
"I think it is a collective thing today," he said. "We just need to be better collectively as a team.
"It was difficult. It was a really warm day and the worst thing you want to do is concede and then have to chase games and try and affect them.
"It was difficult for the guys, but from my point of view I certainly expected a much more accomplished performance than was delivered.
"We'll come together this week and next week we will be fundamentally better."