> Japan does not have this problem at all, even though they invented the anime aesthetic. Where is the Chinese Mario, Elden Ring, or Metal Gear? What studio is producing a truly original distinct visual language?

I live in Japan and I strongly disagree. The products you mention are the ones strong enough to get exported overseas, but within Japan itself you get a thousand manga/anime/dorama/idols/games per year that all look pretty much identical, everything feels extremely derivative.