It's operating exactly how it's supposed to.
It's called "fly by wire" and there are electronic throttle position programmers out there to fix this delay on the new trucks, instead of bashing something most already know about, maybe next time ask if there's a fix first before pis'n in your soup?
You're in luck, the older FBW can't be fixed with a programmer, count your blessings.
EDIT: didn't catch the "E" truck, so this might not work. Thought EV's were supposed to be instant torque? I was referring to trucks with real engines in them.