Well, I’ve got a schufa GDPR data abstract which contains a lot of positive data as well. How many credit cards at which Bank and so on.

Also if schufa incorrectly adds negative entries to your dataset (e.g. due to two persons with the same name having the same date of birth), good luck getting the data straight.

Or if a debt collector enters an unjustified entry…

You obviously did but come in contact with any negative aspects of schufa while working with it, but these cases definitely exist, just check the results on Google…

Informing it is not just a few cases. Not only does it impact things connected to a loan like Buying a house or a car, but also getting a mobile or landline subscription, a credit card and also more and more landlords expect you to show them a Schufaauszug proving a stable financial situation

Wrong, it exists in Europe as well (e.g. Germany)