I found the web UIs of things like protonmail fastmail and tutanota to be really poor in comparison to Gmail. I just couldn't get on with them and ultimately wa

I found the web UIs of things like protonmail fastmail and tutanota to be really poor in comparison to Gmail. I just couldn't get on with them and ultimately was why I chose not to use their services. They felt incredibly basic and clunky - search was poor, things like labelling etc were difficult/not present, I couldn't do a top-bottom window split, I can't remember but I think even the concept of archiving was not there. The crap UIs really really put me off when looking for a non-google alternative email service. In the end I found that Zoho mail had the best modern web UI that is comparable to Gmail (it is not amazing in terms of usability and has a lot of fussiness going on that is distracting) and very reasonable pricing for custom domains with a catch-all and so have been using them ever since. The Zoho app is also acceptable.