As someone that lives in the US I wholeheartedly agree that we should be excluded

I wouldn't want to be in a WTO where the strongest member is China.

The good news is while the US should be excluded - so should China - it might just be Norway and Sweden sitting at a table eating some lutefisk[1].

1. Joke. In reality there are plenty of moral countries, but a lot of the economic powerhouses have clear exclusion reasons - Canada might get a seat at the table, along with Mexico perhaps.

and there exists the problem, and that will be the case unless an organization like the UN is actually given teeth

Well there seem to be some indices available.... https://en.wikipedia.org/wiki/List_of_freedom_indices

I don't think this is a reason not to use them but... right now no one cares about those indices - but as soon as they're between corporations and their profits then there will be a whole lot of lobbying and you'll likely see an index review committee headed up by Reginald Thomas III (son of Reginald Thomas II - CEO of Megacorp X) suddenly insert themselves into the official publication of those indices - then the quality and neutrality of them will drop.

Everyone is fine with you saying "Don't cut down the rain forest" until you actually stop people from cutting down the rain forest.

Making the US the absolute base level would still eliminate a good chunk of offenders

Historically, it might only eliminate 2-3 of them...