Change that to UNdrinkable sludge, and you will perfectly describe Starbucks coffee.
I've had three times that Starbucks coffee was lousy
The rest of the time so-so
Dunkin Donuts has some good ground coffees to brew at home
Trying to think of the one I like = Hazelnut
Better was a store that had all types of coffee beans -
Best was a coffee wholesaler in Little Italy -