There's absolutely nothing to these claims.
You can use your browser of choice in Windows 10, and your search engine of choice. Nothing forces you to use either Edge or Bing.
If you choose to use Cortana then you are asking Microsoft to deliver a different type of service, which it does.
Apple and Google control their own back-end systems in exactly the same way, and Siri also "forces" you to use Bing (among other things) without asking or telling you.
You can change the default search engine to any site that uses OpenSearch technology. In Microsoft Edge, first go to the website of the search engine you want. Then, select More actions (...) > Settings, scroll down, select View advanced settings, scroll down again, and then select Change search engine. Select your search engine's website in the list, and then select Set as default. If you don't see your search engine in the list, make sure that you've visited the search engine's website in Microsoft Edge, and that your search engine uses OpenSearch technology.
https://support.microsoft.com/en-gb/instantanswers/390c87f8-...
Maybe I'm reading your comment wrong, but to me it seems like 1. you use Google Chrome and 2. Google search.
If so, how are these not walled gardens? How do these promote freedom? I'm not sure I see how those are any better.
If I misread your comment and you use actual free software for browsing the internet (which leaves you at Firefox and seemingly only Firefox), please have me and my comment excused :)