Although some points are worded a bit... extreme, they make sense.
Protonmail DOES redirect you to their clearnet site for signing up, but this doesn't mean they are compromised.
And as far as E2EE is concerned, this depends on your threat level. You could use a different email provider (or self-host) and manually encrypt your messages. Or you could trust somebody to do this for you. And as far as a normal user is concerned, protonmail is a good start. Other claims in the article do seem far-fetched.

This article reads like an NSA operation to convince you to move away from a Swiss based provider (where they can't intercept) to a provider that is based in Germany (a 14-eyes country) or similar jurisdiction where US intel has easy access.

It very well could be, and it's hard telling in this day and age. I just stumbled across the article and thought it was worth sharing and discussing.

For what it's worth, I use protonmail myself.