10 Cars That Probably Should Never Have Existed Published on May 15, 2020 in Top 10 by Frédéric Mercier Cadillac CimarronThis awful car largely tarnished Cadillac’s reputation in the 1980s, sending the brand to rock-bottom. The Cimarron was nothing more than a Chevrolet Cavalier with some leather and a new grille, yet it cost twice as much.