Hmm. I guess that would be qwant since it is full of spam. At least it appears like that on my searx instance. And it is not advertisement spam for some product. Just a site that appears same as my search query in some other language that just doesn't exist. It is fucking annoying.

If not for that it would be bing. Since... it is bing.

Google is still quite useful for searching documents. The filetype:pdf thing has saved me too much time. And also looking for stuff in bulgarian only works on Google