STEVE Lomas slammed Millwall's "unacceptable" first-half performance against Birmingham City as his side suffered a heavy 4-0 defeat at St Andrew's.
The Lions found themselves 2-0 down inside 34 minutes after David Murphy's brace and Lomas was furious with the way his players began the match.
Goals from Jesse Lingard and Tom Adeyemi after the break compounded the misery of the visitors, whose three-match winning run was brought to an abrupt halt.
Lomas said: "We told the lads that Birmingham are a high-energy team and we'd have to come flying out of the traps, and if we didn't we would be in for a tough night. The lads didn't heed that warning.
"We started very sloppily and just never got going. We're lucky it wasn't more than 2-0 at half time. We had a bit of a rally in the second half and a bit of a go, without playing particularly well, but we conceded the third and the match was over.
"You can't start matches like we did and expect to get anything from it. We put on a poor show for the fans that came up. I can accept getting beaten if you're having a go, but we didn't and that's unacceptable.
"We're scratching our heads to understand why we got a performance like that. It was poor – there is no other way to describe it. We thought we wouldn't have to dust ourselves down again but we do.
"We have a massive game against Bournemouth on Saturday before the international break and we have to show what we are made of."