1. It's too long. Like, way too long.
While I'm sure this issue may be mitigated for people who are familiar with 120 in other works, as someone reading for the first time, I feel like the article is more preoccupied with dropping lore than getting me interested in what's actually going to happen. I'm presented with "extra dimensional library and ghost dude who tends to it", which isn't actually all that interesting to begin with. This sort of leads to the second problem -
2. Lampshading.
As I'm reading the first interview, I'm starting to think "wow Rivera's being really hostile, moreso than the Keeper". And then the next three paragraphs are the author directly acknowledging this. And this keys me off to the fact that Rivera's character is just "angry and wrong" and never meaningfully changes. Sure, she gives a movie speech before she dies, but it's not so much her growing as a character as it is "People normally give speeches at this point in a narrative".
And this lampshading extends to the conceit of including prose so as to "[give] the entire context of Site-120's establishment and the story surrounding it, as per the Director Council's request."
Within the confines of this article, I have learned nothing from the prose that could not have been presented in a more believable way. It appears that the prose exists, in very broad strokes, to fill out some characters and inform me that the site was attacked by fae.
But the article doesn't actually do the work to describe to me why this is necessary or important, so the end result is that this report is just filled in with what amounts to fan fiction of historical events? Why does a Site-120 employee need to know that Rivera is really angry about having to report to Vemhoff? Given the themes of the importance of stories in this work, and the fae's historic connection to stories, it's a real missed opportunity to weave these elements in beyond a surface level.
Maybe the anomaly of Site-120 relates to cyclical stories unfolding around it, and informing the people stationed there of the story beats can help them identify when the cycle is beginning again. Maybe Site-120 can only be referenced in a greater narrative. But the article doesn't engage with these ideas or ever really justify being mostly prose.
3. Time Period
You have managed to set a story in Poland (well, we'll get to that), in the middle of WWI, and somehow ignore the endlessly fascinating ways that those two could interact. It's World War One! A war that largely arose from a thorny and tangled web of alliances and secrets and national interests that nonetheless do not make a single impact on the story, which leads me to wonder why this is set in 1916 at all? And it doesn't end there either, the article is filled with weird anachronisms, things like
I… I think it will be best if I just attach the file below.
Which seems to be in reference to a video transcript stored as a digital file? Not to mention, Poland didn't exist as a country till 1918 (yes there was a German controlled puppet regime), and the territories that would become Poland comprised most of the eastern front of WWI, which seems like it could effect this story in all sorts of interesting ways.
4. Intent
This is the weakest one by far because it's basically me guessing at the author's intent, and that's why it's so far down on the list. But if I had to guess, I'd say that this SCP was written to help develop backstory and worldbuilding for existing articles, as well as move the chains for future stories involving Site-120. And there's nothing wrong with that! But I'm of the mind that articles need to be engaging on their own terms first and foremost, and this one really felt like it was more interested in being support for other articles than creating an engaging and thrilling story of its own.