Same here. I gave up on Protonmail, even after getting my family to switch to it. Ultimately the lack of good email searching was a dealbreaker. Fastmail has been great, especially with a custom domain and masked emails (the 1Password integration that auto creates them is great when it works).

Seems that Protonmail has made some improvements for the searching but people are still complaining. Oddly enough I'm also using Mullvad but I couldn't be bothered to get it via Tailscale as I share my subscription with my dad.