I understand some people may not even realize it’s a word that puts yankees before all the rest of America, or that English didn’t have a better word like Spanish (Estadounidense) and other languages do, but I feel that since this is a pretty big community and one where the word will be out there a lot could be an opportunity to help spread a better word that does not minimizes a lot of oppressed people.
I’ve seen USian before (today, actually).