Maybe not in the millions, but Meta is certainly not free from bloodshed. For example, in efforts to promote "engagement," they left the rollout of Facebook in Myanmar dangerously unmoderated, and (at least according to claims by Amnesty International[1]) are at least partially responsible for the genocide of the Rohingya there, which saw the tens of thousands of deaths.

[1]: https://www.amnesty.org/en/documents/asa16/5933/2022/en/