I tried DuckDuckGo for a while, but they have way too many spam results on the first pages, when searching for things in my native language, e.g. tried searchin

I tried DuckDuckGo for a while, but they have way too many spam results on the first pages, when searching for things in my native language, e.g. tried searching for details about a new tax law a while ago and got a lot of either NSFW spam pages, or pages redirecting to malware. When searching in English it is not too bad, I don't know what is causing this, perhaps just lack of testing/interest for non-english users, or Bing/DDG doesn't run a malware scanner on its search results. Bing has the same problem. Run the same query on Google and there is no spam. I could try to give DDG another try, but where can I report problems with spam/malware in its search results?