There's lots of things that UK governments have (or have not) done which annoy me intensely. But I despised with a vengeance the idea that unelected bureaucrats based abroad could overrule them. I decided in 1992 that if ever given the chance I would vote to end that absurd situation. I didn't expect any general economic benefit to the UK to follow from it; there's far too many other factors to influence a country's economy. As mentioned, most European economies are struggling and when I last looked none of them had left the EU. I certainly had no personal vested interests in such an outcome. Nothing in the 24 years before the referendum changed my mind and certainly nothing any "here today, gone tomorrow" politician spouted during the campaign had any influence on my decision. I simply did not like the UK being a member of the EU and I'm as pleased as punch that it no longer is.
You are of course entitled to your own views.
However, all that has happened in terms of the movement of powers, is that they are now in the hands of the U.K. PM, government and state. Yes, one of the first democracies, but now recognised as a very flawed system. Further, vast powers still exist in the hands of one person, the Prime Minister. The vast majority of voters don't get a say in which MP or Lord becomes party leader and hence who becomes the PM. The current PM was appointed without any election even within the Conservative party.
Certain laws, legislation or rulings are determined by secondary legislation (which comes under far less scrutiny in the House of Commons) or via decisions by the Privy Council (where most members are appointed by the current government).
The PM can appoint ministers to cabinet from the House of Lords, making someone a Lord in order to do so. Said person or persons don't need any election by the voters.
The E.U. was far from perfect. But there are more checks and balances and it's a more democratic system than our U.K. system. I won't go into details, as you either already know how it works or you are not interested.
The point I am making is that in my own opinion, 'we' have not 'taken back' control. 'We' have just handed more power to our government. And in my view, they have made an enormous mess (I've using polite language) leaving the country in a much worse state than when we were in the E.U.. Honestly, I think a class of school children could do a better job than Boris and the Conservative did.