Jellyfish,
Yours is the best post on this thread. During most of history people have been threatened with far worse than Brexit.
I grew up during the Cold War and the IRA terrorist threat, lived through the 3 day week and power cuts (as a child), and Dennis Healey begging the IMF for a loan so that the UK could stay afloat. The 2008 banking crisis (and the quickly forgotten Euro crisis) were also pretty bad.
My parents and grandparents lived through world wars and the holocaust, not forgetting the Bay of Pigs and Cuban Missile Crisis, when potential Armageddon was hours away.
Previous generations lived with incurable epidemics (the Black Death for one!).
People have really short memories and little sense of history. Personally I don’t think Brexit will turn out that bad but, even if it does, it is not in any sense an existential crisis.
If Brexit is causing mental heath issues, it is a catalyst and not a cause. People need to de with the underlying problem (anxiety) rather than blaming Brexit, because if Brexit wasn’t happening you would be worried about the climate ‘emergency’, North Korea or U.S/Chinese trade war.