The midfielder felt the Hammers did not show their League One opponents the level of respect they deserved and said they cannot afford to make that a regular habit.
“It's just really disappointing," he admitted to whufc.com. “We didn't play well at all until we made some changes, but apart from that we were poor.
“I said numerous times that when you turn up at a place like this you're going to have to fight before you can try and play and do the nice stuff, but we keep shooting ourselves in the foot.
“We keep getting good results, and then go away to Burnley, go away to Bournemouth and not pick up the results we need to, or show the teams as much respect as we should and that's what cost us today.
“It shouldn't matter whether they're up for it or not if we play to our capabilities. If we fight as hard as them they shouldn't be able to beat us, but we didn't do that and that's why they won.
“Now you look to the Premier League and Wolves away is another tough game. We'll get going this morning, assess the players and obviously we've got to put this behind us now and concentrate on the league."