2003 Pontiac Vibe (Worst)
The 2003 Pontiac Vibe was born out of a long-standing relationship that GM had with Toyota. Many cars came out of this partnership, most notably the Prizm. But the Vibe was a poor excuse for badge engineering if there ever was one. The car was a Toyota Matrix with a redesigned front clip and a lot of body cladding (via Classic Car Database).
If you remember Pontiac was heavily into using body cladding around this period. The Vibe was wrapped in more body cladding than the equally ugly Aztek model. The Vibe didn’t sell very well, and consumers were confused about why this model was in the Pontiac lineup. The Matrix was much better for essentially the same car.