Steve Evans was left to rue a poor display from Rotherham United as the Millers crashed to a home defeat against Birmingham City.
Birmingham twice hit the woodwork in the game before Clayton Donaldson struck the decisive goal on 62 minutes.
The away side had been good value for the win and created a whole host of chances throughout the game.
They hit the post through Andrew Shinnie and then Dave Cotterill, impressive throughout, cracked the crossbar.
Rotherham manager Evans believed the performance was not good enough for the Championship and had no praise for any of his players.
“It looked like two poor teams out there,” said Evans.
“I think it was the poorest performance from us that I can remember for a while. If that’s our performance levels it’s not going to be good enough for this league that’s for sure.
“We look at ourselves and it was disjointed. The central defensive pairing have been a rock to what we have achieved in the last couple of years but today it looked today that neither of them had ever played football.
“We will go back on the training ground tomorrow and work hard and if people think we are going to give up what we fought for last year then there is no chance of this.”
Evans said that some players would be “disgusted” with their showing.
He added: “We have got very honest staff and there are some individuals there who would be disgusted by their performance because they are normally very good for us.
“We will analyse some of it, train and get ready for next week. That’s all we can do.”