I don't need that explained, but what I do FFS need explained is why the Leaf uses significantly more energy than for example the Hyundai Ionic or the Tesla Model 3 at the same speed and circumstances. We have all three here at work and did a comparison driving the same stretch and at the same speed. We found that the Leaf is much less energy economic than the Ionic and Model 3, especially on motorways. The differences are huge. When driving on the motorway and driving along with traffic (max speed here is 130km/h in most places), my 40kWh Leafs range is around 150 km max. Which makes the Leaf for longer distances completely unsuitable for me, unless I spend my time idling behind a truck or lorry at 85km/h, which increases my trip duration by almost half.
You said you don't need that explained but your initial comment was "dramatically lower driving range than advertised". Now I see you have a 40kWh the NEDC thing doesn't apply.
I see most people are reporting the WLTP as pretty accurate.
As to why it's not as efficient as a M3 or Ioniq, the Model 3 is designed for high speed runs. The Ioniq is a master of efficiency. The Leaf is a Japanese design with generally lower top speeds on highways so it wasn't a priority.
The WLTP runs the cars at near to 130km/h for about 5 and s half minutes so that is not going to negatively affect the numbers particularly.
But I will say again they can only report the results of the legally required test. Is the test still flawed? Of course.
Maybe they should run from 100% to 0% at 130 and report the result. But it was developed for all vehicles so you could run an ICE for hours at 130.