Google merely claims "your network is sending automated queries" and refuses to work or frustrates with 20 rounds of Captchas with ever-increasing time delays before ultimately rejecting service.
Sites with Cloudflare "protection" are also unusable through Tor Browser. Why use Captchas when you don't allow the user after passing those? I sincerely doubt they cannot tell a "robot" from a human user. Either they are incompetent or simply hostile to Tor users.
-Colbert
In all seriousness, I use Bing on my laptop and Google on my phone.
In the last two weeks I feel Bing has gotten worse, it often refuses to give authoritative answers for queries like "css grid layout specification" and instead spams you with spam pages with watered down explanations, inserted factual and grammatical errors, and lots of Google™️ ads.
I know why Google does it, not why Microsoft does it.
Apart from that, via DuckDuckgo only.