Well, we aren't are we?
And under your system (not in the ECHR) there is no protection whatever for our rights and liberties.
Because under our crazy electoral system, 35% of voters (located in the right places, not evenly spread across the UK) can elect a majority government. And that government can then do anything. There are no effective checks and balances. Our constitution, such as it is, can be amended by a 326/324 vote in the Commons. Take away the ECHR, and whatever they then vote for is the law.
The law is not about morals. It is what it is. Evil governments can pass evil laws. We have a burning example still in the living memory of very old people. Adolf and his mates were elected. Everything they did was legal under German law.
Far-fetched? Couldn't happen here? That's what they said. And we have seen how demagogues can gain sway in this country and how easily they can lead a huge chunk of the population into folly.
So yes, I would prefer the supervision of the ECHR. And preferably the EU too, even though, when it comes down to it, its powers over the sovereign states that form its membership are strictly limited by the agreed treaties. Because people are sometimes cunts, and very often they do not think things through. It's too easy to inflame people with headlines and conspiracy theories. And our political class is vile, among the worst in the 'democratic' world, while we also have a media that is wholly unchecked and run for the benefit of plutocratic, criminal tax exiles.
On top of all that, Brexit has fucked our economy. That's why you're paying more tax for less, and why that will be a continuing aspect of your life.
Does that answer your question?