We have plenty of our own bureaucracy. We basically invented it.

Could you describe those chains? Specifically, which EU regulations have been holding the UK back?

The (wholly imaginary) one mandating red passports, I assume. The whole ‘sovereignty’ argument was always highly symbolic, and not very interested in specifics.

The chains are still on because the UK still needs to trade with said bureaucracy, and of course the fault of that lies with the EU's bureaucratic nature itself instead of the UK's decision to exit.

Ultimately we should want the EU to be eliminated entirely and replaced with a multilateral free trade treaty, and UK's exit is a very productive step in that direction.

How does that multilateral free trade treaty works?

You'd still need the same bureaucracy compiling the norms, except instead of doing it once for 27 countries you'd do it 27 times.

See how long it took to create other agreements like the EU/Japan, EU/Canada and failed EU/US.