Wigan striker Henri Camara scored a late winner to earn Paul Jewell's men their first away win of the season.
"My thoughts are that if we came away with anything from that game we would have been lucky.
"We never started and Wigan bossed it in the first half," Coleman said after the 1-0 home defeat.
"We huffed and puffed in the second half but they had the better chances and were livelier than we were and that disappoints me.
"We did not deserve anything in the game. It's a bump in the road.
"It's going to happen during the season. We are not going to get points in every game.
"We need to put this game behind us and concentrate on next week."