Romelu Lukaku admitted Chelsea were his "fourth choice club" to join, claiming that he is not happy with the situation under Thomas Tuchel at Stamford Bridge.
The 28-year-old further raised questions on his future at Chelsea by saying he "knows he will return to Inter" in the future.
"Last summer I went to talk to the Inter board and I asked for a new contract," Lukaku told Sky Italia. "I said: I’m 28, I wanted to plan my life in Italy with a new deal… but Inter said no. Maybe there wasn’t the economic possibility. For me it was difficult to accept.
"There are three teams at top level: Barcelona, Real, Bayern. All the players dream of them, that’s the truth. I thought I was going to one of those clubs after Inter. This didn’t happen and I said: there is only one club where I can imagine myself, it’s Chelsea.
"Last summer I didn’t think about going to Chelsea until they really came with an offer. Simone Inzaghi behaved very well with me. When Chelsea contacted me it was a challenge for me. Also because it bothered me a lot to have ever won Premier League titles in 8 years.
"It was hard to turn down the chance to return to the Premier League in the club I support since I was a child."
Chelsea paid a club-record £97.5m fee to sign Lukaku on a five-year contract on £212,000-a-week.