The 35-year-old claims that match official Andrea Gervasoni should have awarded two penalties to the Nerazzurri.
"I'm sorry about the result," he told Inter Channel. "It would have been better to celebrate my 100th goal with a win.
"There were some dubious episodes and also a decline on our part considering that, when we were ahead 3-1, we could have managed the situation better.
"There were two penalties, on [Andrea] Ranocchia and I? I think both could have been given. I don't know what the referee's assistant near the goal was doing."
The defeat leaves Inter fifth in Serie A with 50 points from 31 matches.