Americans seem to be one of the only two groups that actually could do something about Americans shipping hay to the Middle East, no? How is that a "can't do anything about it"?
Outside of voting for politicians in elections who promise change in this regard (and casting a vote is a very coarse signal), the average individual American can't do much. And blaming individuals for taking advantage of the system they were borne into is dumb—individuals cannot be expected to understand the macro-level naunces that group behaviours have.
Voting is a much worse waste of time and resources than making the right choices. Even if you vote for the "right" congressional candidate, the hurdles of getting a bill out of committee, avoiding lobbying pressures/temptations, making deals with other members of Congress, watering it down with the other chamber, hoping it doesn't get vetoed, etc, already reduces your odds by, let's say, 95%.
If you buy local, in-season, sustainable foods, you have a 100% chance of being 1/300MMth of the solution, not a 5% chance of being that same 1/300MMth of the solution.