You point out an interesting angle re: the role of the Italians as Axis participants.

Significant omissions, however, weaken your point. While the lack of Italian military successes in the Mediterranean and North African theatre are notable, the British and Allied forces nevertheless needed to commit their own resources to recover and hold territory that was Axis controlled, stretching their own capabilities and diluting a committed frontal assault on western Europe.

The inclusion of U.S. troops to the African campaign did not even begin until Nov. 1942, at which time the Soviets were beginning their counter-offensive at Stalingrad against the poorly equipped German soldiers. This battle lasted until Feb. of 1943, but the Allies didn't begin Operation Husky until July of that year.

Without proper references (e.g. fuel supplies) that could strengthen your premise, you have stated something as fact which in reality is speculative history.

An article like this could probably best be put forward in a book so as all angles of the postulation could be fully examined.