Dominic Cummings got to be inside Number 10 and entirely blew it with Brexit and everything else. He belongs in the "discredited" pile with the Trussnomics lot.

No, actually his plan for Brexit was the most coherent, and Truss/Kwarteng were on the right track but executed appallingly badly.

If you go for Brexit the "hard way" as the country did then your way forward to compensate and to create growth is to find new competitive advantages and there are not many options apart from going low tax low regulations.

This never happened. Truss/Kwarteng made a bad and short-lived attempt and that was it.

I am not saying Brexit was a good idea but this is one of those massive changes of course that require "going big or going home" instead of trying to keep things as they were when that's impossible, and slowly fail (it does not mean that it would necessarily succeed but at least you're going for it).