Is there ANY "seller" protection when buyer requests return but seller must deny???

[networkrepublic-usa]

Our eBay store has had a few buyers purchase items then either request return beyond specified return time allowed OR damage/break the item and claim it was sent damaged then request return or open a case and eBay ALWAYS sides with the buyer. Is there any way to get eBay to understand that the buyer must follow return policy and siding with the buyer after THEY damaged an item is poor business practices on eBays part?

Even when including this information in the open case or return request, eBay sides with the buyer and pushes the return through, forcing the seller to take a loss and accept broken goods and accept items way past the return period offered. 

Even contacting eBay customer service does nothing. What is the next step? Appeal the transaction on PayPal?

Here is the issue as an example: 

- Buyer purchases item and ends up breaking it well beyond the return period time offered and claims it was shipped broken.

- Buyer requests return, leaves negative feedback, and seller denies return due to:

1.) buyer damaging item

2.) return requested after time period for returns/exchanges offered

- After seller denies return politely and requests feedback revision, buyer opens case.

- Seller provides updates and information in the case regarding the situation and after case time period lapses, eBay sides with buyer, instructs buyer to ship item back and once item arrives eBay automatically withdraws transaction amount from PayPal and gives the buyer their money back.

How is this fair for the seller? To allow the buyer to break the item, return outside the return period, seller takes a defect, gets negative feedback, and LOSES money on shipping both ways?

Please share any helpful information on how to deal with these issues.