Hoover did a lot of economic intervention that made things worse but Rosevelt continued them for 12 years which kept America down when other countries were recovering.
Hoover's so-called intervention was on such a small scale as to be meaningless. Roosevelt combined fiscal stimulus with dumping gold convertibility and the economy took off like a rocket.
It must have been a delayed launch because nothing happenned for 16 years.
You should really learn some history instead of relying on talk radio to think for you. Industrial and farm production increased by huge amounts from 1932 to 1936 and unemployment was cut in half. The reason the economy fell back into recession in 1937 is because FDR foolishly listened to the conservatives of his day and slashed spending.