Admittedly, I don’t know much about Brexit, but from what I have been exposed to, it seems like a decisively economical and political impairment that made travel and business with the rest of Europe more difficult and costly. Since it is so highly criticized as a terrible move, why doesn’t the UK just rejoin the EU?
It is not out of spite. More like a “Fool me once” situation. Brexit has cost the EU a lot - not as bad as it is for the UK, but still. If the UK ever rejoins, they would have to make sure that such a shit show never ever happens again. If only to sell it to the EU members who all have to be convinced that the UK will be a good boy from that point on.