This specific Walmart has an exclusive return policy than is stricter than your typical Walmart. You can't return items over $25 and they're more restrictive on the items that can be returned. I got rudely turned down by a manager when trying to return an unopened Dayquil.
There are never enough cashiers, making check out time too long.
One time a self checkout machine did not dispense my cash. The manager dismissed my request for help twice, saying I need to call my bank. After 30 minutes a regular employee was able to provide my cash.