I had a paid account Proton Mail for several months recently but it is hopeless for my use case, namely using their Proton Bridge so that I can use my mail read

I had a paid account Proton Mail for several months recently but it is hopeless for my use case, namely using their Proton Bridge so that I can use my mail reader of choice. Proton Bridge does not work as advertised. Its IMAP server loses mails, puts them in unexpected places and synchronises incorrectly. I cancelled my account.