The price has not increased due to the new things your subscription now includes. You are paying no more money than you did when you were only paying for email, if you've used Proton for that long. You are still paying the same price and only using email.

Your gym adds some new basketball courts and doesn't change the membership price. You don't play basketball, so you complain and tell the gym they should lower your membership price?

Your favorite deli likes you so much that they start giving you two sandwiches every time you order one, and you think that since they can offer you this you should be given the option to pay less for a single sandwich?

Depressing mindset.