The messaging app no one uses in Asia?
Second, even if they didn't, with 1.3B users it's as large or larger than any other competitor app globally.
Third, they got 16B for it, while spending like $10 million to make it.
So I don't get where the sneer comes from.
Even if the statement wasn't false, it's not as if use in Asia is the be all end all of success?
I'm pretty sure you made up every claim you just wrote. Why would you bother doing that?
Notably - as you mentioned - Wechat in China, but also Kakao in Korea, Zalo in Vietnam and Line in Japan and Taiwan, where very few people use Whatsapp.