I tried searching for this, didn't find anything. Post poorly built cars, that you have owned in your past from new! I will start with mine:
If you think you had badly built car, think again. Nothing beats East Europen car built in the 80's/90's.
When I was a kid my dad had purchased a Moskvich 21412, and it was the worst that he, and then me had owned ( I had it after him)
The car started rusting in its second years, so we had to replace fenders, sills, and trunk floor. The radiator wasn't big enough, so it will run hot quite often, we had to change the carburetor almost immediately with one from a Lada, the axles start knocking after 10,000 km.
In its third year we had first of many transmission failures. Countless times we were left stranded by this horror of a car.
At the end it we ended up selling it to the gypsies for scrap like this: