There are no bad pinball machines, just poorly set up games. That is the cause of most "worst game ever" comments. Just think about every game where you walked away thinking "That sucked". It was because something didn't work, or weak ass flippers, or slow boring play. Just think what the game would have been if it had been fixed up a bit. Leveled correctly, pitched just right. It would have made it "OK". Heck, even the worst game in the world, Judge Dredd can be fun. It is all just a matter of finding the sweet spot.