Chinese stuff is all style and no substance, and the style is often wasted on goofy shit anyway. Korean art is garbage compared to manga, and, they rip off what's popular in Japanese anime/manga.
Pic-related: Me reading a chapter of Solo-Leveling, the best and popular manwha the gooks have to offer and the vanguard of Japan's overthrow.
There is maybe an argument for the West. Castlevania before it went to shit showed that, when effort is put in, Western studios can ape "serious" anime well enough. However, the west will never produce CGDCT, or SoL anime in general. Period. They will continue aping 'serious' toonami-core anime that, on their part, aped western media. It's just a circlejerk. Additionally, a lot Western TV execs think anime is profitable, but they still don't have faith that domestically-produced shows are capable of competing with the real deal.
Also worth noting that there has yet to be a true pre-CGI 2D era Disney successor. If the West was poised to overtake Japan, you would think we'd be seeing more of those type of productions rather than CalArts slop.