Get an email address that you own, on a domain you control. Switch to a provider that takes your money for whom you are the customer - not the product.
I did this with Fastmail and Iki.fi, a Finnish non-profit[1], who have been selling people "permanent" email addresses since 1995.
Google now sells domains, as well as email through GSuite.
I use them a lot on new projects, because I find them so insanely convenient, but I can't help shake the feeling that now I'm both the product and a paying customer.
So I'd probably nuance your words with: "select a provider whose livelihood depends on your custom".
You can the use whatever service you want. G Suite, Exchange Online, roll your own, …