In the past, I've noted that
@Revoltingest has often spoken of shopping at a store called Menards, though
@Wu Wei says the store is a myth. I've never seen one either. But if they do exist, maybe they're some kind of bizarre exception in the retail world.
I've also gotten great service at nationally known stores
places you might've heard of, eg, Subway, Lowe's, Home
Depot, Ace Hardware, McMaster Carr.
My advice....
Don't go in with a sourpuss attitude. And don't be afraid
to ask for assistance when they don't just leap to offer it.
I've had bad service here & there too. I avoid those stores.
BTW, I like Wallmart. They don't offer me help, but I've
gotten all I ever needed. I like that. And their parking is
just about the best around...that matters with truck+trailer.