Which brand/model would you never buy again?

The car that's given me the most grief is my 2011 Peugeot 508 SW 1.6 e-HDi. Everyone around me said don't buy a Peugeot, especially don't buy the SW. I didn't listen :) But after getting so many warnings, I told myself I'd buy the lowest-mileage, accident-free, unpainted, service-maintained example on the market. In 2018, I bought a 7-year-old car with 100,000 km, accident-free, unpainted down to the bumper, service-maintained. Apart from the automatic gear shifts, I was very happy with the car at first. I'd already accepted that quirk going in. I didn't dwell on it much. The comfort was excellent, it practically glided down the road. I fitted wheels, got brand-new Michelin tires, polish/wax and ceramic coating, a complete detailed interior clean. The car became like glass. First we started with the chronic head-up display not turning on issue. Then, because the doors got heavy, they started creaking from the hinges. Bluetooth had a delay, you'd change the song and 5 seconds later the song would change. You lock the car, one mirror folds and the other doesn't. The parking sensors also gave delayed sound and image as if there was lag. Annoying issues like these started to appear one by one. I used to drive it on long trips. Once, doing 190-210, I stopped at a gas station, took care of what I needed, and when I started the car again it cranked oddly before starting. I hit the road and there seemed to be no problem. On the way back from Istanbul, again cruising at 190-210, suddenly I started getting "engine fault, stop the vehicle immediately" warnings in the middle of the night. I pulled over in Bursa and arrived in Izmir on a tow truck. The injectors had blown. At a time when the car's market value was 85,000 TL, I had 4 brand-new injectors installed at the authorized service for 7,700 TL. They wouldn't cover it under warranty. Apparently they cover it up to 7 years, my car was 7 years and 1 month old. Apparently they cover it up to 100,000 km, my car was at 105,000 km. That's the kind of experience we had. After that I cooled off and sold it. I don't think I'll buy one again :) Apart from Rifter-type utility vehicles, the PSA group is now off the table for me.