Boss Chris Wilder gave a brutally honest assessment of his team's performance following Tuesday's 3-0 home loss at the hands of Southend United.
The visitors scored three times inside the opening 15 minutes with a combination of poor decisions and individual errors contributing heavily to the Blades downfall.
And Wilder offered no excuses afterwards, he remarked: "Disappointed is the understatement of the year, the goals we conceded were unacceptable.
"We gave ourselves a mountain to climb and we never looked like doing so, to go from our performance at Bolton to where we find ourselves now is bitterly disappointing and losing 3-0 at home is worrying.
"I'm not going to hide behind excuses, but two of the three goals were clearly offside.
"Saying that our defensive play in the build up to both was poor and again there were basic mistakes which have proved costly.
"Southend didn't have to work hard for their goals and that hurts. I don't buy this we had a go, we were 3-0 down and we needed players to step up."
The Gaffer added: "I'm learning a lot about the group, including the players I have brought to the club, there is no hiding place and the players need to take the words that have been said in the dressing room on the chin and react in the right manner.
"The performances against Rochdale and Southend have been nowhere near where we want to be, so we have to dig ourselves out of the hole we have got ourselves in.
"I have looked the players in the eyes and named names, I'm not going to shy away from the tough calls, we had possibly one or two performances out of eleven and that's not good enough at any level.
"We now go to Millwall and people will be talking negatively about us a team and we deserve all the criticism we get, what we have to do is dig in and turn this around."