I shopped at Amazon Fresh to see why it's struggling. I found hyped discounts, odd displays, and bad coffee.

• It's been three years since Amazon introduced Amazon Fresh, its second chain of supermarkets.
• But the stores haven't caught on with consumers, leading Amazon to make some changes.
• I visited an Amazon Fresh store in Maryland to see what might be rubbing consumers the wrong way.

Expanding its grocery business has been a goal of Amazon's for years. But it's proving to be a tough nut to crack, even for one of the biggest names in retail.