It is not that they are failing in English, rather that they are less dependent on foreign content, having localized versions from whatever might be relevant. As polyglot speaker, I am really thankfully to have been brought up learning multiple languages. English only got relevant during the last century, and as human history is full of different kinds of lingua francas throuhout the milenias, others will follow.
I have a similar background and the wealth of the content that's not in English is incredible and often missed. From an outsider perspective, the time it took for British media and the political class to take note of the European sentiment on the issue of brexit was around 1 year. It was as if they just found out there was an non-English web out there..
Maybe the US has a higher number, but a lot of those are due to family, not to education.