Oh no, who will orchestrate the next bottoming out? Where can we find another sub .500 GM?
I think Rizzo is slightly overrated, but this is daft. He's technically under .500 if you count 2009, which was a team he inherited from Trader Jim right before the season started. Even if you were to just take out the games Manny Acta managed in 2009, Rizzo is an above-.500 GM.
If one were to steel-man Rizzo instead of straw-man, he's the GM who oversaw a decade where the Nationals became the premiere team of the NL East.