It's bad on Android, but is good on desktop

No ports open to the internet except 80/443 on the reverse proxy

In terms of security, isn't this kind of the same as just opening the server port to the internet, which many others are advising against?

AD2K you mean?

Google is an advertising business, so the "need" for our data is built into their business model. Proton is not an advertising company and doesn't have any relation with any other party where our data drives their business. If you are concerned that Proton will record your IP when you create an account (which they are very clear on in their privacy policy), you are pretty much looking for anonymity if even you claim not.

Tell me you don't understand the difference between privacy and anonymity without telling me

You were being mislead with false information. Share appropriate sources to back up whatever you are saying. Proton has regular audits for security and encryption for all their products, which makes whatever you've been told pretty much false information

Stremio is not proprietary and closed source. It's open source and you can find all the code for client applications and server on their GitHub account - https://github.com/Stremio

Correct, aliases are one of the best built-in features. Unlimited aliases costs covers a decent part of the subscription

If you are referring to ProtonMail encryption, i think it's primarily about encryption at rest, so that nobody except you (not even Proton) can read your emails. Unlike other email providers (like Gmail) where the emails could be easily accessed by the email providers whenever they want/need to (like data for ads or legal orders from government etc). While not at rest (i.e., sending/receiving emails), emails between Proton and Gmail are on TLS unless it changed in recent years. If the email is password protected in which case Gmail cannot read the email until you open it with the password

ProtonMail has a free version which is enough for many. Every email you send or receive in Gmail is being collected as data by Google and i don't want to give my personal data to Google

Brave has built-in ad blocking, so no need to worry about add-ons. And it's familiar for Chrome users since it's also based on Chromium open source

I was a Bitwarden user for 2yrs and recently moved away to ProtonPass. Primary reason for me was native mobile apps and email alias feature. Although it doesn't have a web version yet (which is planned and would be coming in future), browser add-ons and native apps cover what I need and migration was mostly seamless as well