Use a meta-search engine like SearXNG [1] and you're searching not only ad-free but also - if you choose your sources right - mostly bias-free as far as that is possible. You'll get the results Google filters out but others show, those which Kagi doesn't want you to see but others show, those which those others don't want you to see but Google or Kagi or fill_in_the_blanks show.

[1] https://github.com/searxng/searxng