Ordeal of Nylea and the stack
Your conclusion is correct: no counters will be placed, and the creature's controller will not get any lands.
Strictly speaking, each Ordeal's first triggered ability does not &quot;fizzle&quot;. They still resolve as always, but the actions they try to take are impossible so they don't actually do anything. The creature is dead, so no counters can be placed on it, and the Ordeal is already in the graveyard, so it can't be sacrificed.
Since the Ordeal can't be sacrificed, its last ability cannot trigger, so the player can never get lands in a scenario like this.