Which isn't to say that the proportions of windows or columns are always ideal in today's architecture... but for every supposedly perfect historical Gothic cathedral, there are plenty of terribly-proportioned historical examples as well. Overall, I see no evidence of problems of proportion getting worse. Modern architects are just as aware of proportion as they've ever been. But thankfully they're freed from archaic notions such as e.g. exact golden ratios.
Except if you ask people, specifically the people who *have to work in, live in and around these buildings*, and given the choice, they will choose, time and time again, architectural styles which have fallen out of favour with the vandals.
Some think beauty is simply in the eye of the beholder and it's the plebs who have a false consciousness. Perhaps you're one of them.
When I think of people who like older buildings, it's because of the materials, the ornamentation, the history, the culture, the craftsmanship, the uniqueness, I could go on. All of which makes total sense.
But proportion just isn't something that usually comes up. And none of this has anything to do with false consciousness, sheesh.
Reactions to beauty are instinctive, immediate, emotional. The average person on the street knows little about any of the post-hoc rationalizations you mention.
The topology of beauty has been studied, and we know that proportions are important in art, architecture, sculpture, the human body itself.
It costs nothing to create beautiful buildings.
It's strange then that these freed minds produce the ugliest buildings imaginable, en masse. And then pat each other on the backs and give each other awards for being beautiful.
See, for example, this beautiful multiple-award winning waterfront in Copenhagen https://goo.gl/maps/RGpDAsREQhnsvdJu5 only matched by this beautiful Copenhagen Opera designed by award-winning architects https://goo.gl/maps/krhiU9Poh4Ahqu9v6
The main problem is that they completely ignore the place they are: the city, the country, the nation. It's the same haphazard collection of steel, concrete and glass with no rhyme or reason that you can find anywhere: from the third world countries [1] to right smack in the center of a medieval city.
They are all devoid of any character (unless the character is "yet another soulless something").
Sorry for the TikTok link, but I can't get this from my mind: https://vm.tiktok.com/ZMFb14MTT/
[1] This is from my home town. https://maps.app.goo.gl/JnU2AphqF1nPyfnH7?g_st=ic The only reason it didn't win any awards is because no one wins awards for building ugly stuff in Moldova. Otherwise it's no different from Copenhagen Opera.
But I'm intrigued now -- I thought I've heard all of the complaints about modern design, but I'm not sure I've ever heard anyone say that proportions have gotten worse. What specifically are you referring to?
The only particularly noticeable thing I can think of is cars having gotten more "bulbuous" rather than sleek, but that's entirely due to crumple zones for safety.