In his controversial book due to be released on Tuesday, the Swede opens the tome raging about his miserable year at the Catalan club, according to reports in the Daily Mail.
"The dressing room was way too quiet", the AC Milan striker said. "Messi, Xavi and Iniesta always obeyed without protest. They were like schoolboys. I am not like that. I couldn't be myself."
He also revealed how he confronted Barca boss Pep Guardiola after having spent yet another game mostly on the bench, saying the Catalan was afraid of Jose Mourinho, his rival at Real Madrid.
He even told Guardiola: "I am a Ferrari and you are driving me as if I am a Fiat", making a quip about the fact that sports cars are banned from Barcelona's training ground.
Ibrahimovic added: " I didn't have a relationship with the coach", said the Swede.
"He hardly looked at me. Messi wanted to play centre forward and got his way", he griped.