Not saying Starbucks is the best in the world, but airport and co-located stores (e.g. inside a Target, grocery store, or hotel) are absolutely the worst versions of Starbucks. They’re more like a cut down version that sometimes uses instant coffee, has a limited menu, or are just constrained by the difficulty of operating in an airport.
Don’t base your opinion of them based on what you’re getting in an airport.
P.S. Most airport versions of a restaurant are typically the worst versions.