Dimitar Berbatov says he has lost respect for Sir Alex Ferguson over the way his Manchester United career came to an end.

The Bulgarian striker, who moved to Fulham on Friday, said he was unhappy with the way the United manager had treated him in the final months of his time at Old Trafford.

"I don't think I deserved such treatment at United – not playing in the last year," said Berbatov. "I went more than 10, probably 15, times to ask the coach if they need me. And every time I was told that I'm an important player and should not leave, but then again I was not in the team.

"Maybe I should've gone when he [Ferguson] left me out of the squad for the Champions League final [in 2011]. I know he's the boss, but he has lost, to some extent, my respect because of the way he treated me."

Berbatov became United's most expensive player when he joined from Tottenham Hotspur in 2008 for £30.75m, and was the Premier League's joint top scorer in the 2010-11 season with 20 goals.

Berbatov, who said he would not come out of international retirement, felt he fell victim to a change in United's style of play.

"He [Ferguson] tried to explain to me that the team will be using a more direct style, with more speed," he said. "But I've never been among the fastest players, I like to hold the ball, this is my style.

"I found it hard to accept his decision – I still have my dignity. I scored many goals, I won the league two times, and I was the league top scorer, so it's not bad.

"I'll have no problems playing against United as this already happened in my career. But there's no point to look back again. I said goodbye to the people, who deserve it. I couldn't say goodbye to Ferguson."

Berbatov's transfer to Fulham proved controversial in Italy, as he twice turned down offers from Serie A clubs at the last minute to stay in the Premier League but he denied that he had acted inappropriately in his dealings with Fiorentina and Juventus.

"I've never personally told them, 'Yes, I'll play for you'," he said. "It's not my problem that someone is disappointed. After all, I choose where to play and be happy."

The 31-year-old angered Fiorentina when he turned his back on them last Thursday, one day before the end of the transfer window. The player then rejected the chance to move to Juventus. "He did not deserve our city and our shirt and the values it represents," Fiorentina said in a statement.

Berbatov said: "It's stressful. One club called, then another, and a third, and then another. A man can go crazy at one point. I'm a human being and it's normal for me to hesitate."