The 33-year-old Brazil international moved to Loftus Road from Inter Milan in August and has not yet tasted victory with the Hoops in six attempts.
Despite the club's woeful start to the season, which has seen them slip to last place in the Premier League table, Cesar is feeling positive about the future.
"I am unhappy with my performance since I arrived here," he told The Sun. "But I'm not sorry about my choice to join QPR.
"I just want to show the supporters the Julio Cesar who played well for Brazil and Inter Milan. This is my dream.
"It's incredible that still we do not have one league victory. I am convinced we are not a bad team but bad luck has touched us."
Cesar scored an own goal last week, as QPR drew 1-1 with Everton.