With arch kites being common, for example, paragliders, my take on “Mothra” was that it was a sort of single kite, with very short tethers at the ends, so it flew close to the ground. From my viewpoint, the only aspect suggesting a kite “network” was that the panels were not sewn together along their seams, but only attached at the corners, leaving spaces for the air to travel through, lowering the aerodynamic efficiency and advantages of a “high-aspect-ratio” wing. Instead we saw a long, “leaky” wing. Seems like it was just too much trouble to bother with a complete construction, so it was just left “as-is” after attaching the corners of the tarps.
If you can imagine a WWII B-29 limping home with a wing full of holes, as we see in youtube documentaries, it may still barely fly, but it flies better without the holes!