Callum Cooke admitted he was “hurt” by City's 2-1 loss to Crawley Town in Sky Bet League Two.
City’s lacklustre performance in Sussex saw them condemned to a disappointing loss – meaning the Bantams will make the long journey home empty handed.
Cooke admitted it was a devastating defeat, and insisted the players are aware they have let people down.
He said: “We cannot blame anyone but ourselves, and our supporters deserve better.
“We are six games without a win now, and that is not good enough.
“You play for yourself, the manager and the fans, and I feel like we have let everyone down.”
The No.8 - who made his 150th career appearance at The People's Pension Stadium - felt there were no positives to take from the occasion, despite his goal.
Cooke stressed the importance of getting back to winning ways and has his sights set on next week's home tie with Rochdale.
The 24-year-old said: “We have to win next week.
“We need a reaction and there is no better place to do it than in front of our own supporters.
“I do not feel like you need motivating to play for this club.
“We are going to be working extremely hard on the training pitch and look to put it right next Saturday.”