Gillingham manager Peter Taylor says the atmosphere at the club is "not brilliant" following a run of one win in 10 League One games.
The Gills are in the drop zone, having won three league games this season.
He told BBC Radio Kent: "The spirit in the camp is good but not brilliant. That is realistic because we are not good enough and not doing well enough.
"We are dealing with some angry heads because they are frustrated that we are not winning enough matches."
Taylor, who received the backing of Gillingham chairman Peter Scally last week, thinks their performances so far this season warrant more than their current league position suggests.
"With a little bit of luck we'd have had another four or five points at this particular time," the 61-year-old said.
"There are games where we have been unlucky not to get something and games where we've let ourselves down. The majority of games we have deserved to get something out of.
"If, all of a sudden, we were to go and get a couple of wins then the atmosphere at the training ground and in the changing ground would be lifted.
"I don't think we are a million miles away.
"It is not a case of completely changing everything and thinking of a fantastic new shape which will startle the opposition. We just need to carry on believing and working hard as a group."