Imagine being in their shoes. Are you prepared to move to the other side of the globe on a moment’s notice if you’re unemployed? Do you have the funds to do that, such as moving your precious items, and breaking your lease? If you have a family, are you prepared for the impact it will have on them (this guy’s child has health care concerns)? What would you be prepared to put up with in order to avoid that?
Also, many just think of the US as home despite not being a citizen. Many who worked for me went to college here on a study visa. This is the only home they’ve known their adult life. They wouldn’t know the first thing about how to live if they went back to their native country.
Take a look at green card priority dates sometime, and consider how many people it takes to push them there.
https://travel.state.gov/content/travel/en/legal/visa-law0/v...
American citizenship is an extremely valuable commodity in the developing world.
I'm not saying it's easy, but why bang your head against the wall. Go somewhere else, and, if you really want, come back another time, through a different company or on different terms.