Luckily this is not an EU institution, this is an international treaty above the EU. For example, Azerbaijan is a signatory.
Point is, you can’t easily get it through EU legislation to overturn this, as it would need to cross the ECHR, which it won’t do.
For example, Azerbaijan is a signatory.
And doesn’t really care, because there’s no punishment for, say, being a member of something with “human rights” in the name and Azerbaijan simultaneously.
They even occasionally pay fines for torturing someone to death or things like that. Those fines are not that big.
Can’t wait to see the brexiteers’ faces when they realise Britain is still a signatory.