We don’t have relevancy ratings for search engines
We don’t know which search engine has the best search results. There’s no independent third-party diligently and consistently evaluating actual results. We occasionally get consumer satisfaction surveys, but those don’t actually try to verify that the consumers rating search engines actually know themselves how to evaluate the quality of results.
Sullivan, D. (2017). A deep look at google’s biggest-ever search quality crisis. Search Engine Land. https://searchengineland.com/google-search-quality-crisis-272174 [sullivan2017deep]