I wasn't literally asking that for a list. I was asking it to make a point. If you haven't designed anything used by other people, you are in a poor position to criticize since you have no frame of reference. And if you have, you'd realize failure is a part of getting to a good design since it shows your willingness to take risks.

In other words, criticizing a design is fair. The puck mouse sucked. Criticizing a person because they created a poor design is not and shows a lack of awareness of what design work involves.