Some people aren't even worth the energy and time to be angry at. They're not even worth the energy it takes to think about. The sooner you stop spending your energy on them the better your life will be.
Secondly: The vast majority of people you encounter couldn't give less of a crap about you. This one has taken me a long time to process as someone with social anxiety problems, but once you internally acknowledge this concept then life becomes a lot easier. Dress how you want, talk how you want, do what you want - people really aren't going to care. And if they do, they'll forget in 10 minutes.
Unfortunately we still rely on US trade at the moment. We are seeking alternative markets but it is going to take time.
Also cutting off potash is certainly an option, but it is best reserved as a nuclear last resort. If timed right, it could potentially collapse the US agricultural sector but tariffs would be the least of our worries if we did that.
Another option we need to consider is an other collaborative selloff of US bonds and other measures to devalue the US dollar.