Fedex ground is the worst of the main carriers. They aren't quite as bad as Lasership, but they are getting close. Fedex ground is all sub-contractors, which is something Fedex did a while back to save a buck. Even though they say Fedex on the side of the ground truck and the driver wears a Fedex uniform, look at the small letters on the truck. Mine usually say "Operated by Larsen Logistics". Your Fedex Ground delivery person is typically paid far less than a UPS worker in the same position...and it shows. I have had Fedex say they attempted delivery several times in the past and they never even drove on my street, as confirmed by my cameras.
Their website is also stuck in 2004. If you get an error while trying to ship something, it gives you zero information on what the error is actually related to. And don't bother trying to call a human at that place...although the Post Office is even worse when trying to call a human. Fedex seems to do well with large volume shippers...they really don't want business from a little guy like me.
Also beware of rerouting Fedex Packaged to a pickup point like a Family Dollar store. Half the time the store employee doesn't check the packages in, so it looks like it isn't there...but it really is. I will only have packages rerouted to an actual Fedex store access point now.
Note: Fedex Express employees are NOT subcontractors. They are actual FedEx employees with better benefits.