> I don't see how it is less clearly defined than any other human right
Human rights are famously almost impossible to clearly define because they're an entirely abstract category relying very much on cultural consensus for their practical definition
> No one shall be subjected to arbitrary or unlawful interference with his privacy, family, home or correspondence, nor to unlawful attacks on his honour and reputation.
> Everyone has the right to the protection of the law against such interference or attacks.
> Is this definition problematic?
Yes, very much so. By qualifying that the interference must not be unlawful it essentially makes any interference by law (like what was proposed here in the first place) fine
> privacy, family, home or correspondence
This is very restrictive, for instance there's nothing in it about online storage or your laptop / phone since they're neither your home, family or correspondence
> unlawful attacks on his honour and reputation
This manages to be so unclear that if applied strictly it'd ban any criticism of a politician or anyone else as long as you can construe it as "attacking their reputation"