They are not good enough at it.
They love sports they are top at, Baseball, American Football, Ice Hockey and Basketball. Even if the rest of the world hardly plays some of these sports it does not matter, they are the top at them. Where do they play Baseball or American Football in earnest beside America?
They even call the Baseball finals The World Series .
If the USA Football team rises to the top 5 nations in the world then Americans will start to love it. Until then it will be a minor sport in the US.
It's called Football not soccer. American Football has little to do with feet except for kicking the extra point, standing and running on.
