Since some people were asking about good quality coffee in BA here's a curated list. One thing to note is that some of these may prepare a 'real' italian espresso and a real espresso is bitter in general. Also these places usually sell high quality fresh coffee beans.
https://expatpathways.com/the-best-specialty-coffee-shops-in-buenos-aires/
https://expatpathways.com/the-best-specialty-coffee-shops-in-buenos-aires/