For Germany, as an example, Brexit brings a list of changes that are not by themselves negative.
2018, banks and other financial institutes in Frankfurt am Main have begun to prepare to do more business and employ more traders etc., all due to the changes in the separation of the London stock exchange etc. This is going to make some nice surplusses for us.
There will have to be hired some 1.600 customs workers to manage the formerly much easier flowing trade goods. Everything will take longer, which will result in some shortages, shortterm for the UK. But new jobs are a great thing.
German, european companies in general, will look for other companies than UK ones, because coworking through these new barriers is just no good. The UK will have to find new partners, and they may end up with very much worse partners than they had.
But seriously, Farage and Jonson and Co. made the play for the superrich Beritish gazillionaires, who felt like saving even more than they did before. The average citizen will bear the hardships, and they just were too thick to view through the whole play.