Why call it a sprint if it's not supposed to be anything sprinting? We can literally call it anything we want, so why not pick a better metaphor?
I think that many developers who say they dislike Agile really mean they dislike Scrum. I mean, a rugby scrum is pretty violent, and sprinting non-stop is a good way of dying of exhaustion.
Come to think of it, some managers do seem to want the workplace to be a ruthless battleground with worker pitted against worker in a relentless flat-out sprint to seen as a "high performer".