"The timing of the transfer request makes Jermain look an insensitive young man and everyone who has worked with him will know that is not the case," Brooking told the London Evening Standard.
"Whoever advised him to submit the request has let him down badly.
"We want to hold on to Jermain. He's a smashing lad and has two years left on his contract.
"I firmly believe his advisers have made a serious mistake."