I thought a bit more on these complaints since this post. And I realised these complaints can also be ignored by applying some basic mathematics and common sense.
Proton has more than 100 million users by now. So let's say 100 million in this example. How many public complaints would it need to be from these users to really "catch fire"? Meaning - how often do you read about complaints and from how many users? More than 100.000 users? Okay. Let's say there are 1 million dissatisfied users.
If half of that million users complained loudly on the Internet, I would say that would probably be quite noticeable. Media would most likely pick it up, and it would brew up to media storm right?
Have you noticed anything like that? Do you see that many users complaining?
And if yes, that would still only represent 0.5% of the whole user base of Proton. If you include the other half complaining "silently", it would represent 1% of the Proton users.
That still leaves 99% users which are at least to some degree satisfied with Proton.
Even if you pull it up to 20 million dissatisfied users, they would still be in the minority compared to users finding Proton's services being just fine. And 20 million dissatisfied users - that would definitely have caused some media traction, don't you think?