Im aware it's a dumb idea but recently i have done a kill everyone challenge which seems not viable on one level specifically but i would hope this could be a thing even though you see plenty of the challenges on youtube but seeing it speedran would be interesting

Save it for youtube

Why is this worth speedrunning? How would the moderators keep track of how many kills are done/how many are left, so they can ensure everyone is dead? This just doesn't seem like a viable category for speedrunning.

What rdil said^^