The Nutri-Score System in France - can you trust it?

Why does cereal have a Nutri Score of A? Due to the vitamins included? The fact that cereals/grains are still counted as healthy (!) and no one talks about the sugar or the toxic vegetable oils included? Did you know that the vitamins in these cereals are synthetic, mostly the body cannot use them and some can cause harm to certain people? They also use up the vitamins you do have stored in your body, just to be processed… they are anti-nutrient. It’s a lose-lose for you in the end.