Because Google doesn't come to your house, take you in for questioning and then pressuring you into confessing that you did something wrong which disturbed civil order.
You're absolutely right. We take people from other countries and put them in a facility on Cuba and deny them their rights. We treat our own citizens better, and enforce these same standards on China because we must Make America Great Again.
The fact that you bring up these essentially sovereign nation internal issues as if they are fundamental transgressions against human rights (which maybe they are) while ignoring rights violations under your own nose, shows that your perspective on these issues is highly underdeveloped.
China has many problems, and I'm sure forced confessions are probably a larger problem over there than in the US, but for the most part their citizens don't need armchair observers to fight for their rights. They don't need proselytizers, evangelists, or colonists either.
Isn't it nice how we can have TV shows that point out the problems in the US while also being filmed, financed and distributed within the US. John Oliver would have been deported if he did the same in China.
There's a massive difference. Complying with subpoenas is not the same as giving the government on-tap access to all data at their leisure. And for all the US's problems, the rule of law and respect for the rights of citizen's and responsibilities of the state toward them in the administration of justice is leaps and bounds better and more transparent in the United States.