Boarded dog is destructive, not sure what to do?

I’ve been a sitter for a while on here, and had nothing but good experiences. However, I’m currently experiencing issues with a boarded dog, and the owner is being sympathetic but also not really willing to do anything about dealing with it. I’m very familiar with “puppy proofing” and all other protocols of having dogs in your home. Normally I require only crate trained, but I met the dog beforehand and he seemed ok. While he’s an older puppy, I trusted he was trained and socialized enough to handle this. Unfortunately, ever night he’s been here, he’s destroyed or chewed something. They sent some toys for him via Amazon, but he seems more interested in household items. I’ve contacted Rover and they’ve agreed to help with the sitter to sitter if I need. The owner did offer her friend to pick up the dog, but it seems kind of begrudgingly. I understand we as sitters need to expect the unexpected, but I also feel I asked the right questions to avoid this. I didn’t take the dog against my judgment or without meeting and asking questions. So, do I give up? Let the friend take the dog and risk them being upset (the whole reason they didn’t leave with the friend is because she just had a baby)? Keep the dog and keep resenting him so much? I don’t like conflict and I really don’t want this to be a big thing? But it’s to the point I’m ready to stick him on my porch to save my property.