The problem is when we focus on one act, rather than seeing the overall picture. In the year before FDR took office, something like 5000 banks went bankrupt...and in his first few days in office, he stopped the slide in its tracks. By 1936, we were almost out of the Depression, until the Dixiecrats forced FDR to adopt austerity measures, and down we went back into the Depression. But FDR did what was necessary to lead not just America, but the free world as a whole through WWII to a victory. Not only that, but under FDR we transitioned from being a still-second-rate power to the greatest industrial engine the world had ever seen.
And here's a key fact to bear in mind - we had an enormous military build-up starting in 1939 while we were still just beginning our recovery from the Depression...and ALL - repeat, ALL - of that military build-up was government-funded...meaning, taxpayer-funded. In other words, this was an industrial-size government-funded stimulus. According to conservative economic dogma, this SHOULD have driven us back down into the Depression...but it did just the opposite - our economy came roaring out of the Depression...just as Keynesian economic theory says that it should in such situations.
That's why, when I was a young man during the late Carter and early Reagan years with the recession going on, all the old-timers would say, "we just need a good war in order to fix the economy". Keynesian economics works...and FDR proved it in spades.