Michael Andretti says Formula One continues to oppose his team's bid to join the grid because they think they are "a bunch of hillbillies" from America.
Last month the governing FIA put Andretti-Cadillac forward for F1 to agree commercial terms for a spot on the grid in 2025 or 2026.
Andretti has said his team would be ready to join the grid in 2025.
F1 boss Stefano Domenicali and commercial rights holder Liberty Media have not expressed a desire for an 11th team, with the grid's existing 10 strongly opposed to the idea of splitting revenues with another entrant.
While teams do not get a vote on the matter their stance has helped shape F1's opposition.
Why is F1 still resisting Andretti's bid?
Andretti believes F1 and its teams look down on his operation, which has won multiple IndyCar and Indy 500 titles and this season claimed its first Formula E championship.
"First of all, they think that we're a bunch of hillbillies over here," Andretti said. "And we don't know what we're doing.
"[But] because we have a lot of experience in racing, we might come at it from a different angle than everybody else, and it might work."
Andretti called F1's 10 teams "greedy" earlier this year and he said he's mentally prepared himself for the championship's notoriously cut-throat atmosphere.
"We have got to realise what we're getting into. We're getting into a lot of politics and things like that. It's just the way it is. And we'll just deal with it. "I didn't think it would be this hard to get in. But we'll prove our weight to get in."
There is no timeline on when F1 has to strike a deal with Andretti and no obligation for it to do so.