Not to mention the shit that's completely fucking useless, like Juicero - a "juice squeezing machine" that only works with plastic bags you get from their subscription service.
Old mandolin slicers. The plastic on one's produced recently cracks in a year for the cheap ones, or five years for the expensive ones. My grandmother had one that was solid metal. I'm sure it's serving my cousin as well today as it served my grandmother 50+ years ago.