I don't quite understand GDPR though as it theoretically let's me remove my personal data from benign websites, but doesn't let me remove my data where I would really want it removed, e.g. (my personal nemesis) SCHUFA, CRIF, Boniversum - which are all private companies.
SCHUFA is especially bad. They gather some strange data, and then "based on statistical analysis" give you a rating that is completely disconnected from reality. It's borderline necessary to rent an apartment, but if you're a new expat, have 2 credit cards, NOT (!) paying a mortgage, or you like to move apartments often, or try buying something with installments and get rejected (...via SCHUFA check...), then you're in a shitlist without any recourse.