“In April, May, almost everyone took a shot at me,” Lewandowski, who turned 30 on Tuesday, told German magazine Sport Bild.
“I felt no protection from the club and felt alone in the situation.
“I didn’t score in two or three important games and suddenly it was ‘fire at will against Lewandowski’.
“I didn’t see anyone behind me at the time.
“Neither of the bosses defended me,” he added referring to Bayern’s president Uli Hoeness and chairman Karl-Heinz Rummenigge.
This is the first time the striker has commented on his desire to leave Bayern, whose senior figures have repeatedly said there is no possibility of him leaving before his contract expires in 2021.
He has won eight titles in four years with Bayern, but Lewandowski was widely criticised in April and May after failing to score in the quarter and semi-finals of the Champions League, against Sevilla and Real Madrid respectively, in two-legged ties.
Lewandowski, last season’s top-scorer in the Bundesliga with 29 goals in 30 league games, shocked the club in May when his agent Pini Zahavi revealed the Poland star’s desire to seek “a new challenge”.
Now he says support from Munich fans has given him fresh motivation to win titles when Bayern kick-off the new German League season on Friday by hosting fellow Champions League side Hoffenheim.
“I’m back putting my heart into Bayern. I noticed here in Munich how the fans are behind me and I realised, they still want me,” he said.
And Lewandowski played down the significance of working with Zahavi, one of the most powerful agents in world football, after parting ways with his previous agent on 10 years in late February.
“That does not mean that he has to fix a transfer for me – there are enough things that a consultant can take care of,” said Lewandowski.
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