Despite struggling with injuries this season, Thiago has made 12 appearances in the Bundesliga and three in the UEFA Champions League.
"To join Bayern Munich was a brilliant decision," he told Kicker-Sportmagazin.
"I had great years with Barcelona, but the transfer helped me a lot to mature into a better footballer and also to mature as a person.
"They are great players. I have a lot of respect for them. But it was not about winning their place. It was about the whole thing.
"The people at Barcelona did not hand me the feeling they would fully believe in my qualities."
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