Under what law is that a legal or ethical thing to do? Why not suggest ios be taken away from Apple as well and windows from Microsoft?

Who else is going to maintain and develop it? It's the same issue as with Chrome, even if you force Google to give it to some other company, they're all just as bad. And it's too big and too costly to maintain for anyone else but tech giants.

The only other options would be convincing users to pay 5 bucks a month for their software, or have some Government fork over the tens of millions required to pay open source developers. And good luck with that.