The Berlin protesters are full-blown fascists. They are violent and don't respect other people and their opinions.
They also regularly burn cars and attack the police. Absolute scum.
Many of them are also poor by choice. Housing prices going up sucks, but when you refuse to participate in the society, you really don't get to complain about it.
Compared to installing Windows, which often lacks drivers for the network adapters, installing Linux is a breeze.
Good luck getting those Windows drivers without a working internet connection. And good luck explaining your solution to the average, non-technical user.
The main problem is that custom privacy-focused Android versions have to be made compatible for every device and devices come and go all the time.
At some point, hardware progress will be so minimal and devices so easy to manufacture that small companies can offer their own high-end phones and can build for them some years without really being much behind the competition.
When that happens, custom ROMs can really lift off and I don't think we're so far away. One or two more generations of smaller chips and better batteries. We're already at the point where the only innovation is adding more cameras.
It depends on the court. IIRC, that ruling came from the Landgericht Hamburg, which has become a bit of a running gag because of their copyright friendly rulings.
That way you don't log private user data (EU laws etc) and it can't be used to lock someone out of their account.
The only way around this is to attack from a lot of different IPs and that, too, is very easily detectable and solvable in a user friendly way.
Really, how hard is it? I would expect this to be the default for big companies by now.