The problem with this is always the same.
It just doesn't matter.
Send more equipment to Rommel. Send only German equipment.
Doesn't matter.
Push hard enough and you delay the Pacific Offensive a couple months because the USN sends forces to reinforce the RN. The Reich isn't going to gain control of the Med even if the USN has to use Ranger as nothing but an aircraft transport flying off P-40s every couple weeks to Malta.
Doesn't matter.
The Reich can't build ships fast enough to make up for the ones that get sunk by USN forces that join the RN (if anything the whole torpedo fiasco might get straightened out a bit sooner).
The Med doesn't matter to the Reich. Every soldier, every gun, every liter of fuel sent to Africa is a gift to the Allies. Every bullet fired, every nut or bolt used in the Western Desert instead of on the Steppe is a deposit in Soviet War Bonds.
As is the North African Campaign/Western Desert cost the Axis nearly as much as the Stalingrad disaster (North Africa/Western Desert cost the Werhmacht 158,000 unrecoverable losses with the Italians taking better than 360K). All of it for absolutely nothing. NOTHING.
Hell, if the Wehrmacht was willing to send 1,000,000 men to Tunisia the WAllies should have loaned them the shipping. No way to supply them, no way to retrieve them. May as well have them on Mars.
Of all the stunningly stupid military decisions made in Berlin during WW II Africa (and by extension everything in the Med prior to Italy's surrender) tops the list. Take on the three largest economies on Earth at the same time, while facing six times my population? Sure, that'll work. Send off ~10% of my combat mass into a theater that doesn't even qualify as secondary at the same time? Absolutely. Like the cherry on top of the sundae.
