10 Most Messed Up Deaths In Star Trek: Picard
7. One Code To Destroy Them All
At the beginning and the end, Édith Piaf's 'Non, je ne regrette rien' was certainly fitting. With only a ten-second countdown, no one aboard the Stargazer and in the rest of the fleet had time to have any regrets. "Je me fous du passé," sang Piaf. Picard and co. would have to check that, if they wanted to keep on living.
Requirements for activation of the self- or auto-destruct sequence have varied over the years. "Picard zero-zero-zero-destruct-zero" had some precedent, despite normally being one of several necessary codes. No way to take a vote whilst that version of the Borg Queen was hacking in. The fact that one line, from one man, could wipe out so many, was still pretty messed up.
Naturally, Q would snap them out of it, and back into it, but they all still blew up in the first place, at least on the Stargazer. We can only assume that billions of lives were also lost in that particular timeline during the creation of the gigantic transwarp conduit.