Manager Lee Johnson felt he needed more from his players after losing 1-0 to Colchester United yesterday.
After Colchester took the lead in the second minute of the game, several chances fell the way of the home side but they could not find a way past the U's goalkeeper.
Speaking after the game, Johnson said: "I thought second half we gave it a go. I thought the subs gave us a bit of energy but I think what killed us was the first 20 minutes.
"We gave away a poor goal and we knew set pieces could be an issue. You just have to look at the individual mistakes after what felt like the Lord Mayer's Show.
"As a manager, you can try and guard against it and make sure everything is alright but we should have been alright. We keep knocking but we need to go that extra mile.
"There are so many minor things that count in the big picture and I don't know what it was. I don't know if they could handle the pressure of a better crowd. We have now lost to everyone in the bottom five now and it is poor.
"Colchester's tactics were pretty obvious and you can't bemoan them that because they are fighting for their lives and it's a tough place to come here. They have done it and it's irrelevant how they have done it. We shouldn't allow it.
"We have to go again. I'm very disappointed that we couldn't take advantage but it looks like with this group it's going to be a slog so we need the positive atmosphere. I did think it got a bit negative early but I could understand why.
"I don't think our players are strong enough mentally to be able to deal with that and we have to constantly inspire them. It's disappointing but we just have to move on."
Liam Kelly thought he had equalised deep into additional time in the second half but the linesman's flag prevented the goal from counting. "I think it was probably offside," admitted the gaffer.
"I thought we had done enough to get back into the game at that point although it was very bitty. I did think we came out with a bit more about us in the second half and I thought the subs were reasonably effective."
Watch the full interview on Latics Player.