Oh I know the feeling
Now I'm just an aspiring archeologist, but I know that I definitely noticed major historical anachronisms, such as alchohol, during the series from book 2 onwards and it drove me insane.
Not to mention that there was other plot elements that I really couldn't stomach. Among other things, these were the main ones:
* Ayla "the ultimate Mary Sue"- from the amount of stuff she was inventing and taming, I was honestly just expecting her to invent the wheel.
* Jondalar, or as I prefer to call him, “Dongalar the Earth Mother's gift to Women"- there are no amount of words I can use to explain how much I disliked this guy.
* The weird constant obsession with sex- I mean it's the Paleolithic era Mrs Auel, I'm sure these hunter gatherers would have more important things to be worried about.
* The major plot element of people not being aware of the link between sex and reproduction and therefore having no concept of paternity, that goes nowhere once it's revealed- Like Alcohol, this is a historical anachronism as I've read that the concept of paternity/father care goes back 5 million years in hominids, so it would be logical to think that fatherhood would have been a thing by the time the Neanderthals and Homo Sapiens evolved.
You do realise that body hair removal is at least 100,000 years old right? Prehistoric people were able to do this by using seashells like tweezers or shaving using flakes of obsidian/clam shell shards.
You mention that the wooden cave structures the Neanderthals have has been proven in many sites, so I was wondering if you have a sharable source for this because this is something that is genuinely interesting and I've had difficulty in finding information about this.