Oh man you naming it made me go check the first chapter, and I instantly remembered it; the first chapter did the same to me, so badly that I didn't even mark the series as dropped or anything, I just never went back to it again.
I'll give it another shot in this case, but she definitely was rude with her outburst of the food being disgusting, at the dinner table, and how shitty the preparation of food was for an otherwise advanced civilization immediately gave the "My food is superior" vibe that the other girl had, even about how picky she was about the water for tea.
EDIT: Yeah, nope. Got as far as Chapter 3 before the "My food is superior" BS just got to be too much. If they find tomato pasta as good as we do, there's no fucking way they're going to make a drink that tastes like fucking grapefruit and natto and think it's tasty. Similarly, soup made with just salt and the natural flavours of the ingredients can taste really good, and the way they prepared the meat just seemed like an obvious "barbarian preparation methods, they don't properly prepare the meat (bet it isn't even drained of blood)" BS. It works in Isekai Ryouridou because they actually do delve into the socioeconomic politics that keeps the tribes in such a state, but they still have good food and cuisine concepts both among the tribes and in the city, even before he starts introducing novel (to them) preparation methods, often based around some dish of theirs that gives him inspiration (this is the key point: there it is presented as transformative, rather than native ignorance of flavours and similar).