Everyone tidies their cables before a trip. Almost nobody arrives with them tidy. Tidying is a state; what survives travel is a system.
Tangling is a container problem, not a coiling problem
A well-coiled cable in an open compartment is a badly coiled cable four hours later. Movement in a bag is constant and rotational, and anything with two free ends will find its way through anything with a loop. This is why the neat over-under coil you learned from a sound engineer does not survive a flight: it was designed for a cable that gets put down on a shelf, not one that spends six hours being shaken. The variable that actually predicts whether things tangle is not how well each cable is wound but whether the ends are restrained and whether each item has somewhere it belongs.
Give every item a fixed address and keep the charger separate
Use a partitioned case with elastic loops and assign each cable a loop — the same loop, every trip. The point of a fixed address is that you can tell something is missing by looking at an empty slot rather than by remembering. Restrain both ends: a cable tie or the cable's own velcro strap stops the connector end from wandering, which is the end that does the tangling. Keep chargers and bricks in a separate layer or compartment from cables and earbuds; they are the heavy, hard objects, and when they share a pocket with soft items they are what crushes and abrades them. Five minutes, once, and then you repeat it rather than redesign it.
The test is whether you can find the right cable in the dark. If you can, the system works.