Yes I'd find this irritating too.

To make a small concession to those across the pond my US friend (we've been arguing along these lines for ten years) points out a few cases where we Brits are less pure:

(i) Pasta - she insists that the long "a" is much more like the original italian than the north British short "a".

(ii) Van Gogh - (questionable) - I'm not sure that Van "Go" is any better than our Van "Goff" but I'm open to debate. I think the Dutch finishes with a noise a bit like a gargle.

(iii) herbs - we say "h"erb not "erb" - an interesting divergence.

My concern is not that we are right and the USA is wrong (but it amuses me in the same way that supporting a football team does others) but in the globalisation of culture we may lose the right to say things in our own way.

Lounge could well prevail.