This has not been pretty.
After a bit I announced that I would do it on my own, with absolutely no interference from anyone else. I was not going to waste a single brain cell on untangling then re-untangling the net and strings. Or on explaining my reasoning.
Now it is very neatly and carefully stowed in a big sports bag. Each stringy part has its own plastic bag to keep it separate from the next stringy nightmare. I have said that only the most logical and talented person at school is to touch it and set it up.
It took me about 3 minutes. The arguing beforehand took longer.