I think you don't hear about the 'silent majority' as much on the internet versus the small minority that's frustrated about something and complains about it.

Proton is simply the best service available at the moment if you value privacy above best usability.

Having said that, there are some limitations that need solving, for example; - can't increase text size in emails (iOS app.) such a basic feature... (you can only pinch to zoom which doesn't work on a small screen.) Some emails are nearly impossible to read. - searching is terrible (it's much much better in the web client, you can even search mail contents there.) - can't get notifications for specific email threads / contacts

For now, i'm happy to pay a company that invests in my privacy, and thereby support future improvements.