I was under the impression anyone tech-savvy enough to understand GDPR thought it was crazy, and the only people for it were non-tech-savvy people that just see it as free money from big tech companies.
This continent still remembers when Nazi Germany and the Eastern Bloc tracked people to abuse and even kill them. That was never a direct concern in the UK, but people there are still strongly against government databases (see: UK national id card trial, NHS database trial) and in favour of the right to privacy.