The art of bad design

I have a wastebin in my kitchen. It's a simple bin, mostly thin sheet metal, plastic inner bucket. The lid opens by a pedal at the bottom, so you don't have to touch it with your hands. It was rather cheap, though one of the most expensive ones the store had on display.
Now, someone has spent a couple of days designing the thing. They created a few prototypes, tested them, created some production models, tested them, then set off to mass produce them. Also, the designer probably designed wastebins of similar type before, and they obviously use one on a daily basis. You'd expect the bin to be perfect. But it's not.

First, the hinge that holds the lid protrudes a millimeter. When you lift the inner bucket from the bin, that millimeter is enough to make the bucket get stuck, you can't lift it out without wiggling and jerking it. Which, if the bin is full, causes content to fall out. There's no reason for the hinge to protrude. At the same cost, it could have been made so that it doesn't stick out. But they didn't.
The second issue is when you want to get the plastic bag out of the bucket. Most people use plastic bags in the wastebin, so they don't have to thoroughly clean the bin every time they empty it. The handle that you use to lift the bucket, is one millimeter smaller than the bucket itself. It sticks out to the inside. Which means that when you lift the bag out, the handle gets pulled up and you can't lift the bag. Again you have to use both hands and wiggle and jerk, causing garbage to spread over your kitchen floor. There's no reason why this handle should stick out to the inside. It's just a designer being thoughtless.

I'm surprised how a person who has experience designing wastebins and who uses one, and has used many in their life, can make such stupid and unnecessary mistakes. My theory is that they are not the person who does the kitchen work too often in their household, or they wouldn't have made these mistakes.