The economy grew 58% in eight years of peacetime from 1933 to 1941, then grew 56% in four years of wartime. Unemployment fell to below 10% in 1937 when the U3 is adjusted for emergency employment programs. FDR's New Deal was a boon to the economy, surging employment and GDP.
Regardless of the propaganda the public school system tells us, Franklin Delano Roosevelt actually made things worse. In May 1939, Treasury Secretary Henry J. Morgenthau Jr. Testified before the House Ways and Means Committee: "I say after eight years of this Administration we have just as much unemployment as when we started… And an enormous debt to boot"