Paul Jewell wants an immediate improvement on Saturday's defeat at former club Wigan Athletic
"Derby County is a great club and a lot of players, not all of them, don't deserve to be here," he told the club's official website.
"But we've got to try and get to the end of the season and try and shape them up or ship them out for next season, because that's what it's going to take.
"I never slag players off normally but the way they've played, I can't defend it.
"I will defend my players all the way if they are giving their best and things are just not happening.
"But I can't defend that performance. It was absolutely disgraceful."