Initialisms in common speech are the linguistic equivalent of a code smell; people are right to react negatively towards them (and the appropriate degree of negative reaction increases with the length of the initialism in question).
I wish I could cleverly work in a "QED" here (from Latin) but it just doesn't fit.
By the way, QED is just a calque from Greek. (Like most things Roman...)
As an American, I'd find it hard (at least in my circles) to find an American who doesn't find it cringe worthy.
In fact, I don't think I've heard anyone use that term in at least forty years.