24: Chevrolet Cavalier
The Cavalier was the pinnacle of a bad car and there was no reason for it. The car had a cheap design from day one, with GM using the most minimalistic approach that they could. The cheap interior would fall apart and the plastic would crack soon after the car was on the road. The air conditioning would seldom work and even the radio was faulty. Not to mention the main problem, the fact that the Cavalier was not a reliable car (via Hemmings).
Surprisingly, GM kept the Cavalier in production for over 30 years. Sales numbers were never great but they were never awful either. The car was more known for being purchased by large fleet buyers or rental car companies. But with all of its problems, its reputation was tarnished quite quickly. GM replaced the Cavalier in the 2000s with the Cobalt, which was a better and more modern car.