Just five on-track passes were completed after the start of last weekend’s season-opening Australian Grand Prix.
Andretti told Autosport F1's approach meant it missed out on the “great job” IndyCar did with its 2018 changes.
“The [IndyCar] series, the management have done a great job in tweaking things,” he said.
“They’re doing the right thing with the aerodynamics of the cars and coming back to more of a pure-looking single-seater, open-wheel car which I think was something all of the open-wheel aficionados wanted to see.
“Unfortunately, last year’s cars started looking more like a sports prototype car with all the winglets and all the bullshit that was hanging over, but what they’ve done, I think is [what] Formula 1 missed [out] on.
“They reduced the downforce of the car which is an element, they still gave them good downforce with the ground effect because it does not create turbulence.
“But with the smaller wings, you can stay near the guy’s gearbox and you can have a competitive overtake.
“I think personally that’s where F1 missed it, they gave them more mechanical grip with wider tyres that gave them bigger weights which created more turbulence.
“And by doing bigger wings, they shorten the braking points even further which eliminates almost the chance of overtaking.