Churchill is well-looked-upon by History, mainly because Churchill wrote that History. In truth, most of his schemes turned out be extremely costly in terms of politics, men and materiel. He demanded rationing and privation from the general public, but he dined on luxuries and champagne daily. Bit of an asshole, really.
He got Turkey into WW1 on the side of Germany. The Gallipoli defeat was a Churchill scheme. The Northern Africa Campaign was a Churchill scheme. Likewise the Italian Campaign.