>Or am I just getting old?

Obviously not, since 20-somethings also dislike that and express the same things openly, which they didn't in the past.

Also obviously not, since one can just see it by comparing e.g. 10 pictures of NY or Chicago or LA vs 10 pictures of Berlin or London or Barcelona cafes from 1980s and from 2020s, and the latter all look alike. It's also been studied (even academically) and has several names: airport aesthetic, international style, placelessness, global monoculture, airspace aesthetic (air as in airbnb), etc.