Why don't you just answer my question 
You've implied that all the rights of that act were already in place in this country before it existed and would still be in place if we left, so it was a simple question why leave, I mean if your point is correct then there's no advantage to leaving is there 
Why don’t you ask an actual proper question rather than your normal pithy emoji laden response then?
The issue with the ECHR is not so much the rights themselves, Britain was a drafter of the ECHR and an early signatory to the convention in 1950. But it was Blair's Human Rights Act of 1998 that formally enshrined the rights in UK law and bound us to the judgements of the European Court that is primarily responsible for the concerns today.
Do you not think we had human rights in the UK before 1998? The Magna Carta was 1215, Petition of Right 1628, Habeus Corpus Act 1679, Bill of Rights 1689, etc, etc.
The main objections to the ECHR/HRA are:
- it undermines parliamentary sovereignty: in the traditional UK constitution, Parliament can make or unmake any law, and no court can override primary legislation. In practice the ECHR has bound courts to interpret statutes in line with the convention meaning parliamentary accountability is replaced with judicial oversight.
- there has been mission creep: The ECtHR treats the Convention as a living instrument that evolves with present-day conditions. Critics argue this has produced expansive readings way beyond the intent of the original drafters and what the UK signed up for. Particular issues around Article 8 (family life)
- it causes immigration and deportation constraints: connected to the above, some articles and rules have been used to thwart the UKs processes
Here’s the case put together by Suela Braverman, worth a read if you’re really interested in the why leave argument-
External Link/Members OnlyProponents of leaving the ECHR emphasise that exit would not abolish human rights: core protections exist in common law, other statutes, and remaining international commitments. It would restore the pre-HRA/Strasbourg-expansion constitutional balance, allow Parliament to decide the precise scope and balancing of rights in light of contemporary challenges, and end the practical supremacy of an external court whose interpretation the UK cannot unilaterally control.