Bedrockgames
I post in the voice of Christopher Walken
5e uses the word "primitive" six times in the core rules. Five usages are negative, one is neutral. Emphasis mine.
PHB:
"In these yellowed pages were tales of bold heroes, strange and fierce animals, mighty primitive gods, and a magic that was part and fabric of that distant land." (This is the neutral one.)
"[T]he Dark Six are the primitive, bloody, and cruel gods who offer a dissenting voice."
MM:
"Primitive. Hill giants" congregate in "steadings built of rough timber or in clusters of well-defended mud-and-wattle huts... Their weapons are uprooted trees and rocks pulled from the earth". They wear "crude animal skins... poorly stitched together with hair and leather thongs."
"Whether these tall, gaunt creatures [the ancestors of githyanki and githzerai] were peaceful or savage, cultured or primitive before the mind flayers enslaved and changed them, none can say."
"Lizardfolk are primitive reptilian humanoids that lurk in the swamps and jungles of the world."
"Primitive Wanderers. Ogres clothe themselves in animal pelts and uproot trees for use as crude tools and weapons."
Hill giants have INT 5 and are chaotic evil. They are "raging bullies", "selfish, dimwitted brutes" whose "laziness and dullness would long ago have spelled their end if not for their formidable size and strength".
Lizardfolk have INT 7. They eat other humanoids and also sacrifice them to their god.
Ogres have INT 5 and are chaotic evil. They possess "Legendary Stupidity. Few ogres can count to ten, even with their fingers in front of them." They are "lazy of mind", "greedy" (in the sense of avaricious), "gluttons", and have "furious tempers".
Whether it is being used negatively or positively, it seems useful here. I understand instantly what is meant by lizard folks being primitive or hill giants being primitive.