"We had good possession, albeit with no end product," Coleman said after the game at The Valley.
"We went in a goal down, but after half-time we looked like a team hanging on to a lead.
"The passing was poor, we got a goal at the end but with the performance we put on, we didn't deserve anything from the game.
"We lacked an edge, especially in the final third. We didn't get the ball back quickly enough."