If you want to feel better about British willingness to butcher French too (ignoring the huge chunk of older loanwords from French - e.g. most -ion words and -ment words, maby other large groups), look up the English village of Beaulieu (named by French monks, so it's the French "beau lieu"), and how the English pronounce it.

It was maddening to me when visiting the place.

But as Alexandre Dumas reputedly said, English is just badly pronounced French (ok, so that is an exaggeration; and I cant be bothered to check if that statement is apocryphal or not)