I don't follow. Chevron might be a rotten company, but multiple courts in countries that aren't banana republics have found convincing the evidence that Donziger engaged in illegal behavior to procure a verdict against it in Ecuador.
If there was a legitimate case against Chevron for its past actions in Ecuador, it seems to me that Donziger has basically poisoned the well (no pun intended) and ensured that there will never be justice in any meaningful sense.
I live abroad and have traveled extensively (I've spent time on every continent except Antarctica). The US has plenty of problems and IMO is experiencing significant decline but if you ever get a chance, spend some time in countries that have poor corruption rankings.
You might have a different perspective on what a "banana republic" actually looks like.
If there was a legitimate case against Chevron for its past actions in Ecuador, it seems to me that Donziger has basically poisoned the well (no pun intended) and ensured that there will never be justice in any meaningful sense.