The US anthem can’t be sung well by the average person (especially towards the end), hence why in stadiums the crowd doesn’t even try to sing along and just cheers and whoops. The UK is about the monarch at the level of the text. But the US anthem is about the same thing in how it functions as a piece of music to create a social situation where the crowd remains passive in its adoration of a single person. There is no collective experience of doing and participatory togetherness. There is only the admiration of the celebrity pop singer as an emblem of the American aristocracy.

But yes the UK anthem is an awful dirge.