Millwall boss Neil Harris stated that he made his feelings clear in the dressing room following Wednesday night's 2-1 defeat to Sheffield Wednesday at Hillsborough.
Barry Bannan and Tom Lees put The Owls into a 2-0 lead in the Sky Bet Championship clash and despite a late rally and Ryan Tunnicliffe's first goal for 10 months, Wednesday held out to inflict a first League defeat of the campaign on The Lions.
The manager was honest in his assessment post-match.
"I thought the performance was disappointing for 70 minutes," he told millwallfc.co.uk. "There was nothing in the game whatsoever and most of it was played in the opponents' half. But we were rubbish with the ball, I have to be honest.
"We gave it away time and time again and never had any sustained pressure. The first goal is an unbelievable strike but we should do better in the build-up, and then the second one is embarrassing - giving a free-kick away and then defending like we did.
"You give yourself a mountain to climb at 2-0 down. The positives are that we finished really brightly and should've got something out of the game. But we've got to take our chances when they come along. I'm disappointed - it's the most disappointed I've been with the group in a long time.
"I've made my feelings clear in the dressing room. You can't be a team that dominates at home but then comes away with the wrong mentality. It's not individuals, it's collective.
"I thought the last team that Sheffield Wednesday would want to face off the back of the weekend and the manager's comments was us - a Millwall team coming here after beating Derby, full of confidence and being settled. But I didn't see that performance coming - we were second best."
The Lions were without Shaun Williams for the trip to Sheffield and also lost George Saville at half-time - and the boss stated his reasoning behind both.
"Sav has come in with what we think is concussion. His vision was a bit blurred and his mind wasn't quite right at half-time, he took a hefty whack. We'll see how he goes over the next few days.
"Shaun's had a serious family problem. We've stayed in close contact with him and all looks a little more positive now. We've missed his leadership qualities. I'm pleased for Ryan coming in and getting his goal but it's just unfortunate timing with us also losing George Saville just before half-time."