My worst was an '86 VW Golf. Bought new, treated reasonably well. Dimed and dollared me for 147K miles. This was from the Pennsylvania plant that cost ONE BILLION to put up, and was closed ten years later. Had a "hencho en Mexico" motor, Brazilian rims, German rotors, and Canadian calipers. Driver's seat cushion shifted under the cloth just enough to annoy me till it finally broke in again. Thrown together by someone who lost a bet.
Had a distorted windshield from the beginning, would give you headaches on hilly roads as you looked through the "waves". Replaced under warranty, and the second was nearly as bad. They had me select and approve the THIRD windshield, and it was distorted on the passenger side. Strangely bad CV joint that defied initial diagnosis by two different shops, shook everything, which eventually led to A/C condenser failure, and later, radiator failure, because the stupid condenser is bolted to the plastic shell/ends of the radiator. By the time I gave it away to charity, it had a cracked windshield (stress), a seized right rear brake adjuster, an inoperable RR door, the shifter joint under the console broke apart leaving 2-3 inches of slack in the shifter, leaking coolant tank, and was on its third set of struts (the first set was shot before 7 thousand miles). Oh yeah-and it cost me $300 to have a shop do my (second) cam belt 'cos one bolt on the crank nose froze up and stripped the allen head out. All tolled, it cost me $3000+ in shop costs for an $8500 car.