The Bantams have taken just one point from the last 15 available and managed only a goalless draw at struggling Chester over the weekend, which keeps them in eighth place and one point adrift of the play-offs.
McCall said: "We didn't show enough quality to win the game. On days like that, you need to dig in and do all the dirty things.
"It was a poor quality game but we needed to find that little bit of magic in the final third. We're looking for the players to step up to the plate.
"Winning breeds confidence and, individually and collectively, we're not doing enough to win games at the moment."