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?
There are a lot of good answers, I just want to add that politics like this is slow. The whole question was a fight and caused division. The parties don’t want to engage again because both the parties and the population aren’t ready, and those that supported leaving can’t let go of their pride. It can really take decades for the effects to be felt enough, for the population to have enough outrage/desire to join, and for enough political will to take on such a major issue again. To an extent it’s kinda like facts take a back seat to the emotional will. And I think it needs to be a sure thing before anyone will touch it.