Carra made the revelation in his column for the Telegraph: "Naturally, I'm always asked why it went wrong so quickly for Roy at Anfield and it was due to a combination of circumstances.
"First and foremost, I must be honest and say he was let down by the attitude of some star players who've since left the club. But it is also fair to say not everyone in the squad bought into his philosophy.
"He wasn't perceived as the right type of manager for Liverpool. When Brendan Rodgers was appointed last week he talked about his feeling of Anfield being his 'destination' - revealing it was his ultimate ambition to manage us."