Keane, who returned to Tottenham this week after just six month at Liverpool, claims he was treated bad by Benitez.
He said: “Winning the Premier League would mean nothing at all to me now.
“My brother is a Liverpool fan so I’d probably give it to him. The way I look at it is that a medal means something when you are a part of the squad and involved in winning a trophy.
“When you are in and out of the squad and not involved in games, there are times when you don’t feel part of it.
“Next month’s Carling Cup final means more to me because I’m a Tottenham player now, even though I can’t play.
“Liverpool is gone. It’s the past. What happens there now is not my problem.”
He added: “I did everything possible to succeed and with a different manager I could have made it work.”