Can Haphazard Bombardment destroy something with two aim counters?
Permanents with multiple aim counters can be destroyed by Haphazard Bombardment.

In standard English, "has an aim counter" means "has at least one aim counter", not "has exactly one aim counter". If someone asks "do you have a dollar?", you don't say "no" because your wallet is full of them.

I can't find any rulings that address this directly, but Gladehart Cavalry has this ability:


  Whenever a creature you control with a +1/+1 counter on it dies, you gain 2 life.


and a corresponding ruling that says


  You gain 2 life per creature, not per +1/+1 counter.


which is only meaningful if creatures with multiple counters can trigger it.