Tuta shares most of the same issues. Aggressive marketing and many restrictions on how you manage your subscription and emails. I’m considering mailbox but I haven’t searched enough yet.
This was a common reported issue on their subreddit s between November to January. So, you can probably find many pictures of if there. Also, yes Proton is just another crappy company. I’ll move to something with less restrictions once my subscription ends.
https://www.youtube.com/watch?v=Dp7ght2fMR4