3: Nissan Cube
The thing with automotive design trends is that they don’t stick. Scion hit gold with the XB in 2004 but Nissan tried the same thing almost a decade later. The Cube didn’t connect with consumers on any level. Unlike the XB the Cube was just considered a knockoff of the earlier Scion car and no one went for it (via Axle Addict).
Nissan attempted to sell a couple of these horrible models to no avail. While the Cube had some unique dynamics the final product was lacking. The lethargic performance and lack of innovation left the Cube sitting on dealership lots. The car could have been so much more but Nissan dropped the ball on it.