This is often a symptom of a razor-thin labour budget. Management tends to view rotation as a cost, and any cost that can be ignored probably will be.
If the milk is off so quickly past the best-by date, I’d imagine they’re having trouble with either the fridges not keeping temperature, or literally stocking the shelves in a timely fashion. I’ve been places where pallets of frozen food keep getting taken out of the freezer and can sit out for hours while it’s being worked. I’ve had management tell me it’s fine as long as it’s less than four hours - the generally accepted safe maximum time limit - and they fail to realize that’s a cumulative time per product.
Here’s a complaint form. Apparently Hy-vee is employee-owned, so they might actually care to do something about that.
That’s a bummer. The industry gets by on misrepresenting its product, so I guess that doesn’t really surprise me