Proton AG lost me as a customer the minute they backdoored a binding arbitration clause into their TOS last year.
The difficulty of proving damages in breach of privacy cases combined with generally weak privacy legislation globally means the threat of a class action often serves as one of the only practical deterrents to abuses of power by corporations controlling sensitive personal information. By changing its terms of service, Proton essentially immunized itself from suffering any significant penalty in the event its negligence leads to a mass breach of privacy of its users.
Tactics like the use of binding arbitration clauses are hallmarks of inherently untrustworthy corporations.
After the changes to their TOS I lost any trust I had in Proton