The only thing that non-Americans can try to do is not engage with American businesses, but this doesn't really work either, as from the jingoistic perspective taken by US leadership and media this would be the "unfree world" "ganging up" because "they hate our freedom", and would only lead to yet more of the same, deeper isolation, and the vicious cycle continues.
It's very much worth noting that this is not a uniquely American phenomenon. The Chinese are at it, the Brits are at it in league with the Americans and the rest of their gang, and you can be sure anyone else with a capability is using it.
The same pattern applies elsewhere, and any external effort to apply pressure is propagandised into an attack, justifying the further reduction of liberties and increase of surveillance activities.
So what to do? The only thing I can perceive is the amputation of the power wielded by our senile and demented states by simply rendering them irrelevant through citizen-led governance. This is already happening, slowly, and the collapse of less entrenched governments which is ongoing all over the planet is reflective of exactly what happens when the populace just stop believing in the elite's power, and instead their own. The wheel turns, and gathers momentum.