I'm as anti-Brexit as they come, but it didn't change the UK's direction much. It's still the 2nd richest European state (with the 1st declining fast), the 3rd largest tech ecosystem worldwide, one of the premier military powers. Brexit wasn't great, or even good, but it's not disastrous.
That’s because Europe overall is declining fast. However the rest of the world is rising fast and the next ten years should be interesting from this alone.