I wonder: how ssl (httpS, rtc) traffic could be decrypted and read by a VPN provider? Is there something I missed?

That’s what I believe happens when you don’t value people

There is a word in Russian - «казённое», literal translation is ‘state owned’, but the meaning is that it’s something you should not care about.

It could be also a manufacturing issues caused by stealing.

Is there any known-working ways to install Linux or NetBSD on it?

I did some Google-ing, but only got Asahi Linux as a first M* ported beast, without any details if it can be installed on a bricked Mac.

Airbnb did nothing when my host violated the rules, asked for additional compensation (out of any agreement) and been caught with that. It’s just the worst, but not a unique negative experience with this platform.