What are the worst sets you've ever seen?
Lego is one of the highest quality toy brands available. Very rarely, however, a bad set slips through, even as 999 out of every 1,000 sets will be great.
The first one that comes to mind is the flimsy mess that was the TIE Crawler:
I'm sure others have also come across that one set that just doesn't live up to the Lego quality standards. What are the stinkers you've seen?
(Also, please don't put old sets that don't compare in detail to modern ones, unless they were awful compared to others from that time!)