I got the beans, same beans roasted and ground in the same way in the same shop where I found my desired taste recently, and after making it a couple of times learned that too many things affect the taste. The first time it was good, the second time it was too sour. It is “fun” trying to diff the culprit: water temperature? way of pouring water? psychosomatic factors?
A fun fact I re-learned recently and was able to replicate for myself for coffee: there are different sensors in different parts of your tongue that taste different aspects; sides taste sour more so even the shape of your cup affects the result (wider cup may taste more sour with the same coffee).