When a score shows the opposite of what is true, you simply have to switch it, to see truth. The Nutri Score is on point if you see E as the best and A as the worst.
The nutri-score scam is designed to compare similar products categories, meaning Chocapic, with a "B", is healthier than another similar breakfast cereals products with a lower grade.
But your point is still valid: It is purposely designed by the food industry to mislead the population, with government's complicity.