The EU (Maybe it's only Dutch, not 100% sure) food score system is completely idiotic since it applies to products within the same food category only, but it's not really explicitly spelled out anywhere that that's the case and as far as I know there's not even a reliable way of knowing what product falls into what category (e.g. is a freezer pizza in the same category as potato chips/snacks, or is it a baked good?), or even how they came to the score at all. So a bag of chips, a 4 cheese pizza and a head of lettuce can all have an "A" grade, with nothing to indicate what that actually means.

I'm amazed at how many people, even now after a decade of this system being in place, get confused about why a bag of chips is apparently an A. It's very misleading IMO and not very useful for conveying info, that's what the ingredient list is for tbh.