Massive part of it for these dopes must be the blind refusal to believe they made a mistake, despite all the facts confirming otherwise. The Brexiteer ego can't admit that it's been duped or misled.
So "This is going to be great for Britain" now has to morph into "We always knew this was going to be shit for Britain, but in the long-term it'll be worth it."
I hope she falls into a vat of shellfish, gulps down a few pints of fetid water before being pulled out, then has the shits for the rest of her natural.