2014 F250
gas splashes out filler neck while filling tank, making fueling a time consuming event.
I have replaced purge valve and evap canister. What's next? Completely frustrated

 

I don't know what part of the country you live in but I would look for something that is plugging your vent filler hose, ie.. spider nest, mud dobber or bee hive, ect.

 

Might be a good idea to look into what a vent valve does and where it is located so you could get some idea how to verify if it is functioning correctly..

Also some years had problems with interior valves in the filler neck, that were corrected by replacing the tank.