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.
That said, there are ccTLDs which behave more like gTLDs (like .io, .me, .fm, .gg, .cd) and are treated as such across much of what you do online, but whether that'll impact your email delivery depends on who you communicate with and how they treat spam.