My Vote Goes To...
...The infamous Maytag Neptune, which I feel embodied everything that is wrong with appliance design and manufacture today. It was intended to be energy-efficient and save water too. Unfortunately, due to poor boot design and lousy mainboard quality, many Neppies ended up scrapped years sooner than they should have been, a complete waste of the energy and resources used to build them. It is true that the problems were later corrected, more or less, but not before many consumers gave up on their Neptunes - and on Maytag.
What a contrast to Maytag's other big failure, their combo machines of the '60s. In that case, Maytag did everything but get search warrants to get the machines back and replace them to consumers. Nobody had to file suit, because they were properly taken care of. And Maytag stopped production of the machines right away, rather than blithely telling consumers that nothing was really wrong for several years before finally, reluctantly, beginning to make things right.