Back in the 90's I was a used car dealer selling mostly the cheaper end of the market, so it's fair to say I came across some right shrapnel !
But what's your worst ?
I'll kick it off.......
Zastava Yugo..these were terrible ancient Fiat designs rehashed in Yugoslavia and sold in the rest of Europe.
Noisy rattling engines,awful gearboxes,and build quality to match, at least they were cheap.