> The only issue now is (it seems), that it's the chinese doing it and not facebook/google or local telcos.

No. That is also an issue, few who are informed despute the need to address those as well. There can be more than one problem in need of solving at a time.

Well sure, but somehow noone was bothered by the local three-letter agencies getting the data from the telcos (and google, facebook, etc.), until the chinese did the same with their app.

Plenty of people were and are bothered. Clapper lied to Congress for a reason. Google accelerated their plans to encrypt inter DC links. And at least in the US tech companies release the quantity of requests from the government. FOIA is also a thing. Obviously not enough, yet far beyond any accountability for the CCP.