When i was in college back in the late 70s, i did an exchange program in Colombia. I have NEVER had coffee as good as what i had there. They supposedly export all of their best beans but even 100% colombian coffee beans, hand ground etc, here, NEVER taste as good as the coffee did there. We toured coffee plantations, coffee processing plants etc.
I’m going to make a wild guess, you currently live near sea level, and were at altitude in Columbia.
(nully testing a theory)
One of my dad’s coworkers has a friend in Columbia who owns a coffee plantation or something, and brings back a bunch of coffee when he visits, and brings some up to the office for everyone :) It was delicious!