No they aren't. RSVP, DIY, PhD, ASAP, BYO, TMI... there's no reason to dislike them any more than there's a reason to dislike adjectives.
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.