You asked, "what could we improve?" - Courtesy... communication, diligence and effectiveness. How about a class in being gentlemen? If you do not like to attend to customers, improve a skill, learn so

Service is lethargic. Felt like I was waking them from a nap. I encountered two staff members both did the absolute minimum to answer a question and help me find what I needed.

The employees here won't let you use the bathroom, even if you ask nicely and explain you're only asking because it's important. Shop where they treat people like people. Not here.