I've had loads of fun in all the old sheds I've owned, and the newer ones as well so none stick in my mind as being particularly crap. Of crap cars I have driven, a 1.6 Sierra pool car at my last job is the worst, the wheel could be moved forward and back about an inch or so due to knackered bushes and it would try to kill you if you dared overtake a lorry on the motorway.
Another nasty car was the Vauxhall Disappointment, sorry I mean the 07 plate 3 door 1.6 Astra. Glacial performance; easily the slowest "new" 1.6 I have ever driven, ergonomics designed by a baboon (who also built it) and boot space that could barely manage a toothbrush. Why on earth did people buy these useless things?