In the USA at least, you can't choose to be born there, but you can choose to be involved with the democratic process and even vehemently criticize the government at all levels. Not quite the same in China.
But I can criticize the state and federal government without going to jail, so there's that. Life is really great, so long as you find good paying jobs (sorry teachers, firefighters, EMTs...), avoid crushing debt from medical crises or frivolous lawsuits if you happen to interact with a power-tripping cop.
So what?
Nothing useful is gained from comparing the US with some other country further down the rankings. The issues I mention are don't go away because X country has it worse than the US. Saying "well, X country has it worse" is just a deflection.
I am -not- saying countries Y and Z are just so much better than the US. What I'm saying is what makes a country "good" or "desirable" is multi-faceted and very complex, much more complex than "does the government randomly arrest people or not". That is one factor, but that does not automatically make the US such a utopia.
The many, serious problems the US has won't go away until we actually start addressing them as a nation, instead of deflecting by going "well, it mustn't be so bad since people want to move here".