When he said "Success consists of going from failure to failure without loss of enthusiasm"? Or did you have anything specific in mind?
That's a very good quote. But attacking and invading Russia I had in mind.
When he urged the Allies to re-arm the captured German soldiers on the Western Front and attack the Red Army to drive the Russians out of Central Europe?
That would have been an extremely bad idea as US and British Empire forces were sorely depleted and Russian forces were at an all-time peak.
I did a bit of reading of my own and it would have indeed been a bad idea. But no one can deny he saw all of this coming.