I think the more important number for me to see is how much money he injected into the stock market, ever. Not how much he lost from the peak or from the day prior. That means nothing. Everybody knows gains aren't real until you close a position. In fact, the earnings arn't yours till you're retired and no longer in the game risking anything mark-to-market. Just ask Jesse Livermore - made, loss, made, loss. Earnings arn't yours until you're out.
In the case of this trader, if his story is true, then his total injected according to him is $1.5M from investors + an insignificant portion from himself. So his real loss is $1.5M and change, minus what he still has left. Ignoring real inflation, risk free rate, etc.
So yeah, if someone injected say $500K total over his lifetime into the stock market, and through those astronomical gains of a stock in years prior turned that into $2M portfolio before dropping to zero, that's more like a $500K loss to the market than $2M loss.