The other day, Veteran's Day, my buddy convinced me to go with him to Starbucks for one of their free coffee's. I knew it was a bad idea and that I'd regret it.
However, I went with him since he's my friend and the social time was good. But, the small, free, coffee was terrible - as I knew it would be. I took mine black and he put a bunch of stuff in his.
It was overly acidic and burnt tasting. Yuck! I barely consumed much of it and tossed most of it out when we left. That was two days ago and this morning, the awful taste is finally gone from my tongue.
I should have been smarter and put a bunch of stuff in mine, too, to offset the terrible taste of it. But, since I always make my own coffee, at home, and drink it black, that was the mantra I stuck to that evening.
You have my sympathy and I feel your pain.
Well, Our Absent Mentor had strong views on the coffee (he queried that it could eve be described as that) served in Starbucks. And I agree with him.
In general, it tends to be stale, burnt, bitter and incinerated. Horrible stuff.
Now, I like the ambience of - and the idea of - Starbucks; however, their coffee is awful. The tragedy is - and this doubtless accounts for your experience on Veteran's Day, - is that, knowing that you like coffee, non-coffee drinking (or indifferent to coffee) friends will often suggest meeting in Starbucks, thinking that this is something that you might enjoy. And it is a nice though, prompted by consideration for what they know to be your preferences.
But yes; these days, I get far better coffee at home than I do almost everywhere else.