Brexit was about how we are governed the British people chose self-determination and that has been delivered (eventually).
Thats pretty much all there is to it. How we do economically as a nation depends on many factors many outside our control. But the main factor is us, the British People, if we succeed so will our nation.
I believe the ability to shape our laws and regulation will give Britain an advantage economically but that wasn't the reason I voted for Brexit it was to be governed only by elected British politicians. Something I would have thought an Irish nationalist would grasp.
Northern Ireland is part of the United Kingdom which is not in the EU. Granted there are some trade nuances in that region due to its connectivity to the republic if that makes you happy good for you.
Britain is no longer part of nor do I ever believe it will be part of the EU ever again. Lets say you are right Brexit is a disaster and the people of the United Kingdom are in dire poverty as a citizen of the United Kingdom how does that benefit you ?
United Kingdom? Really?
Scotland and Northern Ireland both voted remain, so they had brexit imposed on them.
Unionists who voted for brexit have had a border down the Irish sea imposed on them.
Your government has broken International Law, reneging on a deal it negotiated and signed off on.
You wanted to be governed by elected british politicians. Would you care to comment on Dominic Cummings and David Frost? But the main factor is us, the British People, if we succeed so will our nation.
I'm not even sure what that means but it would look fine on the side of a bus.
But you promised us sunlit uplands and unicorns. How could brexit possibly fail. Do you not hold all the cards?