Can you recount a story about good or bad graphic design?

I’m looking at possibly doing my senior project on educating the public about good graphic design, and why it’s important. To help me with that, I would love it if you could recount a story (doesn’t have to be long) about a time when:

(For non-designers) You were confused about what made a design good (note the word “design” here, this is not meant to turn into a discussion about contemporary fine arts). If you can’t think of a story with this, simply write about whether or not you think design matters and why. Try and cite a specific example.

(For designers) You were trying to compare designs in front of a non-designer who could not understand what made one good and the other bad.