We had this same problem and did just this. 3 years later still no changes. Until my dad happened to be complaining about it at a party and was introduced to a friend of a friend that worked at Google with the maps team. Was finally fixed a week later. So yea a path exists but 3 years is a long time to wait for a simple fix.

I'm always divided about it. At one hand, I want to help people not getting lost, but at the other, I don't want to contribute to google.

You can... IF other people do it too.

How? Every single adress is wrong on google for the whole muncipiality since they standarized the road numbering 3 years ago.

You can also make submissions to Apple Maps.

Even though these are massive corporations, they kinda do rely on feedback here.