The US3 can cry foul until they are blue in the face. That's their prerogative, but it will get them nowhere. The playing field isn't level. If it was, the US3 wouldn't exist any longer.
Whether there is any truth to the allegations levelled at the ME3, and I really don't care either way, that's not the be-all and end-all of the OP's question. Look at Asian carriers. You'll get a 3 course meal from HKG to TPE. SQ, ANA, CX, and many, many more provide vastly superior service, and are far less protected than the US carriers.
The point I'm making is just a repeat of a point already stated - it's nothing to do with uneven playing fields. It's because the market has spoken, and it's price sensitive in the US. The US3 are printing money. It's not as if they couldn't afford to pour it into upgrading their poor product offerings; however, they've worked out the limited wisdom in doing so. The demand for lavish product just isn't there, as it appears to be in Asia.
The US3 are now adapted to their market. It took a long time, but it seems they're about there.
If you want a better product, you can choose an Asian carrier to head west, and a Euro carrier to head east.