The Allies lost at Arnhem BTW, and also Airborne troops are elite troops. So i guess this is another poor example. Airborne troops even as elite units can't hold out without supplies and they didn't get back home, but surrendered.Frost's British Para's at Arnhem were combat inexperienced from what I've read. They had no time to "prepare" as you say, with mines and traps, and certainly had no suprise on their side. They were few, and lightly equipped, yet held off just the type of troops you say they were no match for in equal numbers, and they were outnumbered.
We can go at this all day as far as I'm concerned. You're talking theory, and I'm telling you what happened in practice.
Find me an example of a division of infantry ( not airborne, just regular) holding back. Panzer Grenadiers or any other mechanized infantry. I can find many examples of the reverse.
Fine put them in the desert... all of them. all land is flat in this example.In war, rarely are terms on an equal footing.
The mechanized just pick them off at a distance and move around and surround them.
Regular infantry is just hiding in the dunes shooting small arms at armored cars, half-tracks and light tanks? You might give them pea shooters too.
On second thought just make mechanized infantry 0-1-1-6 units