I personally understand FN to have been the Steven Hawking of the Psyche and the worlds first Psychologist. Actually in my readings FN has great respect for Plato and goes back and forth in a love hate relationship.
FN was a peer to Plato and was in a position to criticize. Philosophers are notorious for their sometimes petty and sometimes profound differences.
I find that Nietzsche's profundity and confounding writings mirror the enigma of reality itself or gordian World Knot.
Plato had him beat by 2271 years.