Conspiracy theory: I could see there being some general anti-American bias in soccer.
Soccer is not and will never be our most popular sport. It likely will never be top 3. We’ve never been successful at the sport (Men’s side of it at least) the way the European and South American countries have been. For the US, soccer is a sport. For a lot of these other countries, soccer is their way to save their family and escape poverty.
Then add in America is very controversial on the global stage, even though every single country that criticizes us would call us in a heartbeat if they were under attack or being invaded.