Bingo. Starbucks (any most nationwide coffee chains) are pure garbage when it comes to straight black coffee.hell, it's 90+% sugar addiction. Most people who go to starbucks and the like don't actually like coffee. They like the idea of "coffee" and really enjoy a coffee flavored milkshake every morning.
Starbucks figured this out very early and capitalized on it. It's why if you order a straight black coffee from there that it tastes burnt. They purposely overroast beans for consistency because it's easier to overroast at scale and they know the overwhelming majority of their orders include milk and sugar loaded up in it to dilute the burnt taste.
Like mentioned already, give me a QT coffee or any gas station that brews Community.