Back in the late '70s when Fred Smith set up Fedex, they told him the "Hub system" would never work... all packages were flown to Memphis, then back to destinations... I had letters of credit packages that I prepared in Sunnyvale, CA.... about 40 miles south of San Francisco... the packages were going to banks in SFO....but made a detour via Memphis.
Truthfully, I though Fedex's service began to deteriorate when they bought out Flying Tigers cargo airlines....bout 1985..... at that time I was shipping a lot of hazmat goods around the country and around the world.... as often as I could, I used Flying Tigers... their hazmat clerk was one of the best at the Houston airport.... most forwarders knew that if you could get a hazmat package past Red at FT, then it was properly packaged, marked, etc....after Fedex came on the scene, he was told his qualifications were not acceptable to Fedex.... became near impossible to ship hazmat with FEDEX. My company at that time specialized in shipping oil field explosives...
In my area, biggest complaint for Fedex is the drivers will nearly run you off the road... they're really zipping around on these back country twisty road.