The US GDP shrank 29% from 1929 to 1933. International trade fell by 66% between 1929 and 1932. I don't recall hundreds of millions of people dying in the 1930s.

US mortality rates declined during the 1930s. https://www.cdc.gov/nchs/data-visualization/mortality-trends...

World infant mortality rates generally declined during the 1930s. https://www.researchgate.net/figure/nfant-Mortality-Rates-18...