I don't know how things panned out, but the discussions in the early days around Brexit were absolutely on par or even worse than what we're seeing in these two days of discussions around tariffs.
Regardless of contemporaneous comparisons, the up-thread comment I initially replied to suggested there was some ongoing worse 'crisis' in the UK than the current situation in the US, if they meant to refer to Brexit it was not clear at all, regardless of whether anyone things that's an ongoing worse situation. (Except that the fact it's not clear really suggests it isn't...)
'Pretty young' would imply maybe you haven't been voting for very long, and are likely under 25.
An under 25 year old today wouldn't have been able to have voted on the 2016 referendum anyway.
The UK voted for Brexit in 2016, but it was up to the UK itself to invoke it with the EU. They took almost 4 years to do it in January of 2020 after 4 years of arguing about it with a transition period and trade talks with the EU until the end of 2020. It wasn't a surprise and "no one knew how imports worked". Yeah people online made all sort of wild hyperbolic scenarios, but trade was unaffected until the end of 2020. There were shortages in the UK around that time, but I wonder if you remember what happened shortly after January 31st of 2020?
The prescription drug shortages is still a problem in the UK. It's not because no one still knows how imports work in the UK, 5 years after Brexit. It's because the overall imports and exports in the UK has been falling since Brexit. Because the UK economy hasn't been doing great. Brexit, COVID, and then Ukraine/Russian energy dependency came in a pretty bad time for the UK.
Oh, longer than that. Some transition arrangements are _still in practice in place_, for instance see https://www.politico.eu/article/uk-brexit-border-checks-dela... . Brexit is not done, yet; things will get worse before they get better.
Right now we're seeing the 0th order effects.
While estimates of the damage done by Brexit are of course very politically sensitive, nearly everyone agrees that some substantial damage has been done, particularly to trade and jobs (one estimate has the UK with _over 2 million_ fewer jobs today than it would otherwise have, Goldman Sachs says that the UK economy is 5% smaller than it ‘should’ be, etc etc)