4: Chevy Aveo
After the Chevy Metro was phased out in 2001, the brand needed a subcompact car. The Aveo was brought into the mix and was based on a Daewoo model. The car advertised having a stellar interior room in a small package (via The Truth About Cars). That wasn’t entirely true, and the Aveo didn’t sell in the numbers the brand had hoped for. Reliability was questionable, as were initial safety ratings for the small car.
The Aveo would stay in existence for a while, ultimately being phased out with the Sonic. But when it comes to forgettable compact cars, the Aveo was about as forgettable as you can think of. There were much better models, including the Honda Fit. Chevrolet has since abandoned the compact car segment altogether as GM moves toward crossover vehicles.