re: Are pickup trucks difficult to drive?

They are a challenge to drive fast as they don't respond to steering inputs the same way a car does (more turns lock-to-lock). With patience you can thread an F-250 through straight -line traffic almost as quickly as a car. Above 85 or so the front ends have a tendency to lift a bit, not so much on a diesel. Brakes, while larger, still take bit to stop 7700#.
It does appear many idiots failed Physics I.

Longer wheelbases make low-speed turning a challenge, axle length is not the issue.