(ID: A screenshot of tags that read "#Prev what are some alternatives to the word primitive that are less derogatory" /end ID.)
@panicdeleter I'm responding to your question on a new post so that the op of the original doesn't get this in their notes because answering in good faith is going to take a lot of explanation.
Short answer: there isn't one.
Long answer: as you say in your tags, "primitive" is a derogatory term with a very loaded meaning. Removing it from your vocabulary is less a matter of finding a more PC alternative, and more a matter of understanding why it's derogatory and changing your perception of what's being discussed. To do that, we're going to have to look at archaeological theory for a minute. Stick with me, I do have suggestions at the end.
Archaeological theory is a complicated subject and there's no way I'm going to try to summarize all of it in a Tumblr post since it's a topic arch programs devote at least a semester (if not longer) to. So we'll focus on the relevant bits.
Essentially, in the bad old days when archaeology was starting to become a discipline instead of a thing rich dudes did on the weekends, there was this idea that certain European societies were the peak of civilization and everywhere else was less evolved and therefore primitive. It was based on the misunderstanding of the theory of evolution that was common at the time. Like so:
(ID: a diagram drawn in pen. It's titled "Ye Olde Arch/Anth Theory TM". The next line says "Primitive = simple, less evolved, bad". Below it there is a vertical arrow pointing down, with the words "one way line" next to it. Under the arrow there is a line of text reading "Advanced = complex, most evolved, good". /end ID.)
These early archaeologists believed that all of humanity lived on a hierarchy with the "advanced" societies they lived in (and their ancestors like Ancient Greece) at the top and all the "primitive" past and current societies (destined to either become like them or die out eventually) at the bottom.
It's been a long road for archaeological theory. The 20th century was fraught with theoretical movements and debates that sometimes literally devolved into fistfights. But eventually we all ended up more or less here:
(ID: A hand drawn diagram in a similar format to the one above. It's titled "Arch Theory Today (Short Version). Below the title there is a single line of text centred around a horizontal line with arrows at both ends. The left side of the arrow reads "simple" while the right side reads "complex". The line itself is labeled "continuum or spectrum". /end ID.)
While you'll still find some archaeologists who disagree, the main consensus appears to at least be on the same page that instead of the old primitive vs advanced hierarchy, societies exist on a spectrum that ranges in complexity. In the most basic terms, because I'm glossing over A LOT of nuance here, hunter gatherer societies tend towards the simple end of the spectrum while big state societies are on the more complex end. This is not meant as a value judgement of these societies, but merely an attempt to classify them so other people have a frame of reference for what you're talking about. Even so, there's considerable debate about the language used for certain terms and societies, and I am not necessarily qualified to go into that in this post.
I say all that to help you understand why I can't give you a catch-all term to replace "primitive", because if one did exist it would be just as derogatory. In certain contexts there may be more appropriate words that you can use, such as simple (as in the case of the meme that inspired this post) or old. But a lot of the time an alternative just doesn't exist because we are not better or 'more evolved' than our ancestors any more than people living in big state societies are any better than people still living as hunter gatherers.
I know this has been a very long post, but I really am just scratching the surface here. For more information I suggest looking at podcasts like The Dirt or A Life In Ruins, youtube channels like The Welsh Viking or Archaeology Tube, or the blogs of any of my fellow dirt lovers here on Tumblr like @chaotic-archaeologist, @micewithknives, @art-thropologist, @archaeologistproblems, and @rhysintherain to name just a few. Archaeologists are generally a bunch of nerds who will take any opportunity they can to talk about the human past, and we rarely bite.