He also castigated Spaniard Manuel Almunia, his replacement, in an interview with German magazine Kicker.
He added: "To be sitting on the bench behind somebody who only started to play when he was 30 is not funny. I am very angry.
"If the coach had spoken to me before the start of the season then I would have been able to decide if I wanted to sit on the bench. He has a different opinion and I don't really believe he can be happy with it."