I believe in venting frustration as you've done here. But maybe contacting FedEx directly would be more productive.
E-mail FedEx
I have noticed that USPS, UPS, and possibly FedEx have used subcontractors in private vehicles and golf carts delivering packages to the door here. I don't know if they subcontract door deliveries in other parts of the country, but that could be part of the problem. I'd write them.