My worst purchase ever (or at least lately, than I can remember XD) has to be the replacement shaving machine I bought after my last one broke. Seriously. So frustrating to use, pulling the hairs half the time, leaving them at irregular length and overall doing a shitty job of its only job. God, I had forgotten about this (I shave every three weeks or so XD) and now that I've remembered I feel like throwing it out the window.