As someone who typically only enters a Whole Foods or a Home Depot for her retail experiences, the one time I entered a Dollar General, I was struck by how depressing it felt. I would never go back into one. Yes, I know how out of touch this sounds.
I have a very, very convenient Walmart including a pharmacy so I do go in from time to time especially for standardized purchases. But I don't really like it. And I poked my head into an adjacent Aldi once and retreated. Otherwise not really worth the headache.
I think that's deliberate: you walk into a dollar store and think "they aren't spending a dime on the shopping experience, so they must be passing that dime onto me."