tl/dr: Bing is second with 4% and Yandex is third.
My guess is people use Bing when Microsoft literally forces them to or they don't know how to change it (start menu search, Edge default), for downloadable images, and porn.
Yandex is the only search engine available without fuss in Russia.
I'm honestly really surprised that Baidu doesn't have ~20% of the market.
Can someone who knows more than me about China maybe explain?
I'm using Ecosia, which is (as far as I know) based on Bing and I really like it. The search quality really isn't bad at all. (and I'm searching a lot online)
Also it feels more to what I'm used to, without AI answers and other stuff that I don't like at the top of the results.