BRA and USA are not on the same level now. USA's serves are a lot stronger, which puts pressure on NED's reception line. Plus, as I said before, NED's both setters are horrible, making the attackers impossible to kill. Lastly, NED's MBs are too slow, they can't block.
You are right that USA is another level, but when they've got a chance to finish it, they didn't. They could at least have won a set today. Please stop the hate against Bongaerts! As you said by yourself, there was a lot of pressure on the receiving line-up. This didn't make life easy for Bongaerts. Poulter had a much easier job, becasue the reception of USA was much better. Still Bongaerts involved the middles a lot more. She is still young and is a creative setter, I believe in her!