Peterborough manager Gary Johnson pulled no punches following the heavy 5-1 defeat to Charlton.
Wideman Johnnie Jackson opened the scoring from the penalty spot after Grant McCann had fouled Scott Wagstaff in the area and Therry Racon doubled the lead.
Jackson grabbed his second before substitute Lee Martin put the Addicks four up before half-time and though McCann pulled one back, Martin sealed the rout as Charlton claimed a fourth straight league success.
"There is going to be a lot of soul searching and some of the lads have big decisions to make over whether they want to be part of what we are trying to achieve here," said Johnson.
"They either need to be willing to make a big effort to try to turn our fortunes around or they may have to be looking elsewhere come January. We need people who are up for it.
"The two teams looked a good couple of leagues apart at times. Players have not only lost their confidence, but they seem to have lost their game as well."