Note that chart is a logarithmic scale. Chart also does not account for dividend returns.
I wish I was alive during the depression. I would have bought some stocks
That kind of depends on how old you were at the time. According to that chart, you would have been in the red from 1929 to 1955, not even accounting for inflation. Had you been 50 years old at the 1929 peak, you still wouldn’t have gotten your money back by the time you were 76 years old.