Yeah, I suspect a big part of the issue is the fancy craft roast beans they buy, which are inherently too sour for a boring old espresso. I'm not a coffee snob by any stretch and I don't think I'm being overly picky. I would be extremely happy with something that compared to a Nespresso. Unfortunately, this is a long way from that.
Sadly, I can't swap the beans just for me, so maybe I need to bring in that Nespresso machine that's gathering dust. Nardini sells these Gigi pods that are surprisingly excellent, verging on a Neapolitan coffee, even if they absolutely hate the environment with so much packaging...