Also, the US could seem to care less if the home routers, modems, phones, and other equipment made in China are backdoored that these business employees are still using.
Whataboutism isn't an argument but a concession to the person you're replying to.
But when the USA spies, it does so in the interests of the American state and in the shared interests of the Five Eyes. When China spies it does so in the interest of China. For Americans, or citizens of the Five Eyes, there is at least some aligned interest with the state they inhabit and some political recourse available within it. Nothing like that exists for them with China.
The FVEY surveilliance sharing mechanism is designed explicitly to circumvent limits on domestic spying by domestic agencies. It is quite literally an institution designed to undermine the civilian interests of Five Eye countries. AU Prime Minsiter Turnbull literally admitted the reason why Huawei was banned from AU networks was because Huawei hardware made it harder to surveil on AU/FVEY citizens.
At the very least, citizens of Five Eyes nations can attempt to end it by contacting their representatives.
The US and China are closer to being at war than they are to being allies in the sense that the US and Britain or Germany are allies.
The US and Germany, for example, have a more tense relationship at present than, say, 30 or 40 years ago. And yet we'd still send a million soldiers over there to help defend them if Russia decided to march west again with their eyes on Berlin. That's because they're an ally. The same is true of many other nations, like Canada, Australia, Japan, South Korea, Poland, and so on.
I don't believe for a second anyone in this thread is actually confused in the way in which they're pretending to be confused, when it comes to whether one would prefer the US or China to be the top dog of espionage globally. It almost entirely depends on whether you're in the US or in a liberal democracy allied with the US or in China (or one of its few allies).