I switched to Protonmail a month ago. It is patently inferior to gmail. Every day I get annoyed by some weakness in the UI that google had apparently just always solved without me ever having to think about it. For example, reading long email chains in the proton UI is horrific. I don't know what google did that made it natural to read and proton does so badly, but it is painful to read these long chains of emails. Another example is log emails from my servers are getting grouped together by Proton. Gmail had sepearated the logs into separate emails in a very natural way. These small annoyances add up and I'm not having a fun time right now with proton.
I'll never understand why people insist on using web based email.
Just install your favorite desktop + mobile mail apps and you're fine.
If that can't be done with Protonmail, and you want to move your email out of the US, suggest FastMail, based in Australia.
This is actually a pretty interesting observation as GMail, when it first came out, was just as clunky as all the other webmail clients. At the time, everyone was used to Yahoo!, MSN, etc. and Google was the odd one out with their webmail client.
This changed when they were the first folks out there to get a dynamic interface in the browser (some of you may fondly or not so fondly remember the days of DHTML, XMLHTTPRequest, and the like). Fast forward 10 or 15 years and now GMail is the standard by which everything else is measured.
I'm sure there are some things that are objectively better, but a surprising amount of preference comes from familiarity.