Some of the other answers to this question are pretty serious, so I’m taking my answer in the opposite direction.
Here are some products that should never have been made. Not because they are dangerous, but because they are stupid.
Behold.
** YouTube videos, for sale. And what is that? A box, a book? Just open up, and have a look.
** Condiments for dogs. “Petchup” “Muttstard”, cute. What is this stuff supposed to be used on? I know if I would put some in my fridge someone would eat it on a hot dog and throw up.
** This one is kind of clever/functional/stupid. A hairbrush that holds your phone and, wait for it, a selfie stick!
** This one offends me deeply and makes me want to sue the hell out of these people. What if I want to use it? How can it be just 4 girls? I’m hurt.
This is just scratching the surface of the dark side of capitalism. You should see some of the stuff I didn’t list here.