English because even though I can understand the post, my French is not nearly good enough to articulate this point
I'm Italian, as you might now we are the only big EU country to have opposed Nutri-Score thus far.
This summer I spent my holidays in the Auvergne-Rhône-Alpes region and while shopping there I got the chance of interacting firsthand with the score, as someone not used to it.
In many occasions looking at the score and then at the ingredient list made very little sense, in particular some decently healthy food was often marked with harsh scores for reasons I couldn't quite understand. An example of this I remember quite well was a bottle of fruit juice that had a score of D. Sure, it probably has lots of sugar, but it also contained decent quantities of fruits. I thought that was supposed to be a good thing.
I don't think this score is the way to go, honestly. I'm a big fan of the work the EU is doing in terms of food safety but this just isn't the right way to go in my opinion. The indicator is way too simplistic and while the algorithm behind it is pretty clear, sometimes you end up with weird results that to me make very little sense.