Manager Micky Adams said he was "disappointed and embarrassed" by Port Vale's FA Cup defeat at Grimsby.
Vale lost 1-0 to the Blue Square Bet Premier side in a first-round replay at Blundell Park on Tuesday.
"I'm bitterly disappointed and embarrassed, but that's cup football," Adams told BBC Radio Stoke.
"I'm angry and disappointed with certain players and a little bit bewildered. As the manager, I have to take responsibility and I will do."
He continued: "Some of the things you see aren't right, some of the body language and some of the comments I hear.
"What disappoints me the most is our attitude. Do we really care enough about it? I care, but before I start criticising players I need to look at myself."
Vale, who last went out at the first round stage in 2002, have not scored a goal in 388 minutes of football and are without a win in their last five matches.
To make matters worse, Vale were forced to wear Grimsby's red away shirts during the game, after referee Jock Waugh deemed that their grey change kit clashed with the home side's black and white striped shirts.
Seven members of the first-team squad are currently out injured, but Adams would not reveal if he would be able to add any new faces before the loan deadline on Thursday.
"Those discussions are private affairs and will take place between the relevant people," said the 50-year-old.
"The important thing is to get a response from these players. I don't recognise some of them at the moment, which is difficult for me to take.
"At the minute, they're a bad team, bad individuals and I'm a bad manager. That hurts me because I don't think that I'm that."
Vale return to League Two action on Friday evening, when Torquay are the visitors to Vale Park.