If you boycot US cloud, you surely will come into contact with it and therefore have your info stored by US tech companies. Ex. I live in Slovakia and I send an email from XYZ email service to someone who uses Gmail, does that not fall into the US cloud spider web?
You've touched the web long before getting to a Google server.
National borders have always been special demarcations and so any crossing, physical or digital, is subject to special examination.
The nature of modern digital communication has blurred the borders somewhat and perhaps more significantly has made it easy to forget when your digital actions are transgressing those borders.
In the physical world we've accepted that there are border control stations on roads, at airports, and ports. Some of the surveillance mechanisms that have been in the press lately are the digital equivalent. Some seem to be much more than that.
It is going to take some serious public debate and some enlightened leadership to reign in our surveillance state and to come to a better public consensus regarding what privacy standards we want to embed in domestic and international law.