Personally I've been using Tutanota and bitwarden happily. I guess it kinda depends on what you're looking for alternatives to, I don't know if anyone else offers as comprehensive of a complete suite of stuff
Those recommendations would probably be more useful to the person who was asking for recs, though it's worth pointing out your solutions to certain things aren't really 1 to 1 alternatives and may not be suitable for someone who's looking for services akin to proton
"Betrayal" might be a wrong word for it, but I find this disappointing because the current events are the reason I have tried using Proton instead of Gmail. A tweet wont ruin the functionality of Proton, but it goes against my personal rationale for making the switch.
Many feel betrayed because he (partially at least) politically aligns with someone (and something) they loathe intensely. The feeling of betrayal probably comes from an implied idea that because they align on the issue of digital privacy they naturally do so in other aspects, and with the comments made by the CEO that idea is burst and someone who once felt familiar is now foreign.