I'm sorry you had such bad guests @Matthew2341
Airbnb Cover is a limited guarantee and not insurance . Even Airbnb says on its guidance for Air Cover that it is no substitute for having your own insurance.
1. how did the guest respond when you filed a claim under Aircover with evidence of what happened?
2. Under Aircover if The guest doesn't respond or denies the claim Airbnb steps in an investigates... what did they say ?
Lots of hosts say they have problems claiming under Aircover.
if the circumstances are covered by Aircover , and you have provided evidence of the damage and quotes for repairs then I believe you can pay a few hundred dollars to go to arbitration and if you win your costs will be covered.
Personally I would claim on your insurance as it's likely to be much easier @Matthew2341
please leave an honest review to warn your fellow hosts .