Defender Matthew Upson insists Curbishley has the full backing of the players.
"Curbs seems a bit more relaxed and he most definitely has the backing of the players," said Upson in The Sun.
"I can understand why he is under criticism. He's taken a job at a football club who had a huge financial injection.
"People expected big things at this place and, so far, those massive things have not been delivered.
"But people need to be aware that it is a process and no matter how much money you throw in, there has to be a foundation."