Store hours posted in my neighborhood

Saw these yesterday while on a walk with the kids. Listen, I know I'm old and approaching 40, but really? How can you run a business like this? Is this a millennial thing that I'm not supposed to get?
  1. This was posted on the newly opened beard grooming store.
  2. Read the small print on the bottom. For real? Why such anger mixed with inability to open on time? Also, this is an ice cream store so I feel like they should have a better attitude.