The winger is relishing his return to Portugal and insists he has nothing to prove on Thursday against Napoli in the Europa League
The Portuguese midfielder arrived at San Siro Porto in 2008 in a deal worth €25 million, but left the Serie A side in 2010 after failing to impress.
However, Quaresma dismissed suggestions his time under then coach Jose Mourinho was comparable to Mario Balotelli’s struggles at the Giuseppe Meazza.
"Inter is a difficult club; it is not managed in an organised manner like Porto,” he told La Gazzetta dello Sport.
“Some people have been unfair to me. I’m not naming the people who have been kind, but each was thinking only of himself. Nobody gave me support, but I will say no names.
“[Balotelli] is different. Balotelli is Balotelli. He is a good guy, it's not true what they say about him.
"He is always under pressure, always too much spoken about him. He makes his errors but he is much better now. Mario is one of the best players in the world.”
Porto face Serie A outfit Napoli in the Europa League last 16 on Thursday, but Quaresma insisted he isn’t targeting the Italian outfit as a chance for revenge.
"I am 30 years old and I have nothing more to prove," he declared. "Everyone knows who they are and what my qualities are.
"The only thing I have to do is to always work to the fullest and give everything for my club. I have nothing to prove to Naples or the Italians.
"I hope to score, no matter how. Napoli has a great coach, a good team, but we have so many young and talented players and we’re playing at home."
Porto's first-leg meeting with the Partenopei at the Dragao is scheduled to kick off at 18:00CET.