In the EU there are only a handfull of countries really affected by Brexit, the neighboring countries, whereby the relative effect is bigger in the small bordering countries.
The effect of Brexit on global economy, because of that enormous scale size of global, has always been neglectible in forecasts, except for those forecasts where it was assumed that the UK would go 100% cliff edge WTO. But even that scenario had minimal effect.
=> for Brexit you have to compare with Iceland, Ireland, Denmark, Netherlands and Belgium and somewhat with France and Germany.