Just to say that was good explanation from Goldenbear but there’s no point!
The vast majority of people just don’t understand the (rarely used) role of the ECHR and they certainly don’t understand basic data protection law.
The ECHR is there to protect the people from the State and help ensure that if your own state commits atrocities there is some recourse. The UK was the original driving force, British lawyers drafted the basic constitution and Winston Churchill was the key person pushing for it. The number of times there have been findings against the uk are teeeny tiny. In a country of +68,000,000 people there are just over successful four cases per year between 2012-2023 . In 2023 there was only one violation by the UK showing the continued downward trend. It’s an important safeguard in principle but not an impairment to anything in practical terms.
With Data P it is seen as some meddling EU interference, when in fact it’s is basic law with parallel UK provisions opted into by the Uk by choice to defend citizens rights. It’s very basic protection attempting to keep little individual peoples’ names, addresses, numbers and other personal data private when up against big companies misusing it. The people who object to it are often the sort of people who do paranoid shredding of their documents, yet object to DP which actually gives them control over who sees their data and the ability to make big organisations delete it when asked.