The Brazilian has endured a miserable campaign highlighted only by a pair of ninth places, while his team-mate Pastor Maldonado has only managed to score a solitary point.
Although the team has introduced several updates in a bid to turn their fortunes around, they have still been unable to make any notable steps forward.
And Barrichello now believes that any further improvements are pointless and the team should instead focus on finding out what went wrong in the first place in order to build for the future.
"The car was born bad and there is no way of turning that back," he told Autosport.
"There are ways of massaging and improving it - but the most important thing is not to improve this car, it is to understand what went wrong and to make the next one better.
"Otherwise, the next one will be born the same way. It needs addressing.
"There are two or three causes of the problem, and that is what makes it an unknown situation. With a different engine and a different guy building it, the car will have a different characteristic anyway.
"But if they solve the problems of this year in full, the chances of building a much better car next year are greater."
The 39-year-old also thinks that the problem stretches further than simply finding a consistent downforce balance.
He added: "It is more than that. We have been having problems with the quality of parts, because one day the car could be okay, and the other car with the same wing will not perform in the same way. So we need to address that as well."