No. No one thought Namor had "fits of rage" until like 20 years later when Byrne decided that. Most writers before that were pretty good at showing Namor had some justification for being angry -- like air breathers nuking his city or dumping chemical wastes in the ocean.
The black suit Reed created for him just to allow Namor to breath out of water, which a chemical spill robbed him of. IIRC, it was Doom who fixed the problem as well as bringing the Atlanteans out of a toxic coma.