Have you ever pushed a pull door on accident? I certainly have. Sometimes, you can't be blamed. The font is too small, the placement is too weird, and it is not an eye-grabbing color. This is a classic design fail. Someone was supposed to design something you could use, and they didn't do a good enough job. This happens all the time, in fact, it's what makes up most of this list. But sometimes human error is real. Sometimes our little caveman brains are too dumb to understand what's right in fr…