Does anyone get super bored at work to the point where they want to quit but at the same time customers asking dumb questions like "do you work here" and "where's the till"(when it's literally 20 foot steps away visibly) pisses you off but sometimes your customer service is top notch and u enjoy it.

The bad parts drag and I'm fighting with thoughts of leaving early, taking a longer break, hiding in the stock room.

Like I'll literally ignore a customer as long as possible without blatantly being rude  if I'm visibly busy (because I like serving one customer at a time, serving two overwhelms me) but at the same time I feel like I should be given more responsibility because I'm good at what I do (when Im not in an agitated or low mood).

Idk how to change this. I know it's wrong but these people should also use their common sense. I worry that once I get a career job, I'll act the same.
 Is this something you grow out of?
Is this a bpd thing (black and white thinking/splitting or emotional dysregulation)?