Neil Harris has called on his Millwall dressing room to stand up and make themselves counted after surrendering a lead in their 3-2 defeat to Sheffield United.
.David McGoldrick's double condemned the Lions to a seventh Championship game without a victory, despite Billy Sharp missing a first-half penalty.
The Blades striker atoned to score the opener but Jake Cooper and Lee Gregory found the net for the hosts within the first five minutes of the second half.
Yet Millwall crumbed as McGoldrick scored a penalty and then netted with two minutes to go, with Harris issuing a rallying cry for leaders to emerge from within.
"These late goals must be down to concentration in the group and a winning mentality," said the manager.
"You can talk about bad luck or good goals against us, but these were poor goals and people not doing their jobs - that's what it boils down to.
"If the dressing room has anything about it, now, they should lift themselves.
"If they want to do their jobs properly, and they want to be considered for team selection, they need to show more leadership and more quality in themselves in key moments.
"It might sound a little bit harsh, but it's time for harsh words. We've thrown points away again.
"The table doesn't lie, it never lies. We have to do what made us so good last year. Ultimately individuals have to perform better than they are.
"I'll do my job, I'll make sure the players are prepared to play Nottingham Forest Wednesday night."
Millwall remain stranded in the relegation zone after McGoldrick tucked home from three yards two minutes from time, after scoring from the penalty spot ten minutes previous after a foul.
Sharp had earlier put the Blades in front, atoning for missing his own spot-kick thanks to a wonderful save from Ben Amos following a hand-ball.
But, after the home crowd made their feelings heard at half-time, Cooper headed home from a corner just two minutes after the restart to level up the contest.
Gregory then ran on to a ball over the top and finished to put his side ahead on 50 minutes but United battled back.