Is Switzerland some internally-accepted authority on how food content is supposed to look like everywhere, and force it down the throat of literally whole world? We know how that would work...

These are private corporations, their HQs are in Switzerland purely for corporate tax reasons, otherwise they would move away long long time ago, given massive salaries required to get & keep top staff.

If given countries were really that concerned and wanted to push for better products sold in their countries, there are numerous ways. They can do literally anything they want back home on their own market, or they can push ie via WTO arbitrage, heck even European courts do handle some Swiss lawsuits.

Or you know, people just educate themselves a trivial bit about nutrition and stop buying stuff that is harmful.

We can have a smart discussion with facts and reality check, or emotional outbursts that lead nowhere.