There is a pandemic, so this is mostly about the careless attitude they have toward reducing the spread of COVID-19. Their disposable masks often slide right off their noses AND mouths, and they seem too dim-witted to grasp the concept of protecting themselves, let alone others. And if its explained to them, the explanation is met with rudeness from them. But part of the issue is that the local enforcement is non-existent. There should be no excuses from the store.
Are you the owner of this business?