As bad as this was for the UK, I suspect the rest of Europe is about to go through far worse as their energy and chemical inputs from Russia haven't even been completely severed yet. Once that happens, I fear that their economy might completely collapse.
There have been some concrete advantages to Brexit:<p>- Regained control of borders. This is going to be an increasingly important issue going into the 21st century as Africa is going through an enormous population boom.
-No longer on the hook for the debt of certain EU nations (Italy and Greece being big ones)<p>It'll be interesting to see his this shakes out over the next decade. If the UK achieves some degree of freetrade with the EU while regaining control of borders and a more independent ability to adapt to changing conditions, they could still come out of Brexit up. And tbh a few hits to the City and London area aren't necessarily a bad thing imho. The rest of the country needs some serious attention (Scotland as an independent nation would very possible have the worst social and economic outcomes of all Europe).