You don't understand why your own nation isn't following the tantrums of a totalitarian regime? That would make your own nation into China, why the heck would you want that?!
Opening your nation to trade, while the other does not, and does things like subsidize their companies to put yours out of business, is not good.
The US should probably play tit-for-tat and ban an arbitrary Chinese company for every US company banned by China.
That way, China understands at least the repressions.
Of course, that policy might not work, as it would just spiral up into a big 'ban fest', but you get the idea.
Banning games is a funny thing, people like games. People are going to be upset.
When people are playing games, they are not agitating.
When people are bored, they think about things like politics.
To quote HN user stale2002: Tit for tat reciprocity is the basis of most modern trade relations.
It is also a basis of the most bloody and destructive wars in the world. Are you hoping that this time US wins again?