The forecasts of the consequences of the Brexit vote weren't correct. It's worth considering why. Well, firstly the BoE stepped in with interventionary action in the form of QE and interest rate cuts. Secondly, and most importantly, the vote coincided with a global boom, fueled by Trumpian economics. But we have gone from the best performing to worst performing developed economy in this time, so we have experienced a major relative decline. Thirdly, unemployment figures now are so massaged as to be meaningless. However, take home pay is in decline (for 10 consecutive years in my case). Lastly, it's very difficult to measure uncertainty. Industry and the markets have correctly assumed we will get the softest possible Brexit, do the worst fears have been mitigated.
In contrast, it's much easier to model the consequences of Brexit itself. All models and all scenarios agree, there can be no positive outcome. You dismiss GDP (the country's wealth) as if it is of no consequence. You seem to forget this is the money we need to pay for our health, education, and welfare services. Your stupidity is quite frankly astounding.