Kmart. Terrible management who have no idea what they want, they try to shove internet stuff on their customers even though all of their customers are 80 years old, their point-of-sale computers are wrecks and crash several times a day, none of their ways of doing anything make any sense, and I really hope they go out of business soon.

Honorable mention to Sears which is owned by the same company as Kmart is and so is nearly as bad. Somehow their computers were more stable despite being as old as I am.