Bolton midfielder Nigel Reo-Coker admitted they let themselves down in the 3-0 defeat to Chelsea.
Reo-Coker felt Bolton were too soft as they allowed Chelsea to coast to the three points at Stamford Bridge.
The defeat leaves Bolton level on points with basement boys Wigan and Reo-Coker concedes people are right to question their mental strength.
"We have let ourselves down big time," Reo-Coker told the Bolton News. "The sad and true fact of the matter is, we just weren't good enough.
"We crumbled - we were soft. They were soft goals to give away and it was a soft character to show considering the situation we're in.
"And if people are questioning the mentality then you can't blame them."