Gary Waddock delivered a damning verdict on Wycombe's performance after they were thrashed 4-0 at fellow strugglers Chesterfield.
Craig Westcarr, Franck Moussa, Alex Mendy and Jordan Bowery were all on target in Monday's League One clash at the B2net Stadium and Waddock said: "We've let everybody down, it's as simple as that.
"After the good run we've been on we've let everyone down and that was a poor performance by anyone's standards.
"I would like to find something that was good about it but I can't, there's not one aspect of our play that was good. We made them look a very good side, we just didn't get close to them and we gave them too much room on the ball.
"I just feel for the supporters who travelled up here because we didn't give them anything to cheer. If we're playing poorly like we were here, we don't hang on in games, we just fall apart. When you're on the field of play you have to stand up and be counted and we didn't."