I've had nice things to say about these SCP-087-style articles before, but at this point it feels tired for me. This is also a very uninventive application of the trope. It's a dark hole in the ground, you go down, you see some weird stuff, and then a monster eats you and you die painfully.
The extreme claustrophobia being invoked here is perhaps a little distinct, but really nothing distracted me from how played-out this one is. Even though it's a format I can be rather fond of, it seems these SCP-087 clones were really a dime a dozen. I wouldn't even recommend this for a rewrite, because there's no reason to want this any more than RPC-108 or god forbid something actually somewhat imaginative like RPC-073.
2/5 for mild competence.
This place makes me feel like I’m a little kid again. Before I went to jail, y’know?
"You know how I'm a CSD, right? I used to be a kid and then I went to jail and now I'm here. I just want to establish to the audience that I'm a CSD and this is my character."