The Brazilian forward insists he will get back to his best on loan in Brazil, though is determined to make a name for himself in Milan in the future.
The 22-year-old scored just once in nine league appearances in Italy before moving back to Santos on loan.
Nicknamed 'Gabigol', the striker also struggled in the Portuguese league while on loan with Benfica.
Speaking to 'Gazzetta dello Sport', the youngster said: "I'm young and still have lots of objectives and one of these is to win with Inter Milan.
"After the Olympics, there was a lot of pressure on me with fans and media expecting a lot.
"'I did the best I could to adapt to Italy, but things didn't go well. Having said this, I'm not going to give up a centimetre and I'm thinking of the future.
"My disappointing year in Milan will help me grow. [Inter] are a top club, they have won a lot internationally and many Brazilians have made a name for themselves at Inter.
"I never had any doubts about accepting their offer, despite having some other, equally big ones. I've got a contract to 2021 and I'm relaxed now. I'm just thinking of giving my best for Santos."