> Nuclear powers

meh. It is a deterrence at best. Contributes nothing in terms of economic might.

> Soft power

Agree. The royal family which was a major attraction seems to be on wane (imo) after Queen's death

> permanent UN security council member

This is rooted in post-World-War-2 setup. If the council had to be setup fresh today, UK will not figure in top 5 for sure. There are many countries which are more deserving.

> Brexit has been an act of astonishing self-harm

Agree.

> Talking about "trying to survive" is a bit ridiculous.

Agree here too.

The key thing is that UK is declining. Its the trend that is important here.