John Sheridan has questioned his players after the 5-2 defeat at Oldham saw Chesterfield slump to the bottom of League One.
The setback at Boundary Park was the Spireites ninth league match without a victory and the Blues boss said afterwards: “The way we played, we deserve to be bottom of the table.
“It’s just shocking watching some of us play, how we defend, we’ve worked on it all week.
“Some of the players shouldn’t even be out there, some of them aren’t good enough at the moment, we’re not good enough.’’
Chesterfield found themselves three goals down after just after the quarter hour, by which time the outcome of the match was realistically settled.
Sheridan added: “I’m embarrassed for the supporters that have come to support us.
“I’ve got to question the players that are going out on the pitch and I’ve got to question myself, ask if I’m picking the right team.
“We’re conceding very, very soft goals and too many soft goals. To be three down after ten or 15 minutes is just not acceptable.’’
The previous week. Chesterfield were dumped out of the first round of the FA Cup by League Two outfit Torquay who won 3-1, an experience Sheridan described as his worst-ever in football management.
The last time Chesterfield gained three points was on September 17 when they defeated Carlisle 4-1.
Since then in League One, the Blues have conceded 23 league goals - an average of 2.5 goals per game.
And men in blue face a tough challenge on Saturday when promotion-chasing Sheffield United visit the B2net.
The clash could see two on-loan players - Jonathan Grounds and Lee Johnson - making their final appearances for Chesterfield.
For their loan spells are due to run out after the derby showdown which is expected to attract a gate in excess of 9,000.
The game has a 1pm kick off.