NAPA vs. Autozone vs. O'Reilly... price and quality?

In January of this year, I went to a NAPA store.I had already drank a
lot of coffee that morning and it was cold weather.As soon as I got to
that NAPA store, I needed to use the rest room, it was sort of an
emergency.They would not let me use their rest room.There is NO way on
Earth I will ever go to any NAPA store ever again! In my opinion, those
''people'' who work at that NAPA store discriminated against ME.If you
know what I mean?
There are plenty of other auto parts stores around here, I don't need
NAPA.
cuhulin