Too much of this is "As you know, Bob" dialogue or is overly generic or doesn't sound right ("D-3748 couldn't take it anymore. "Human beings?" he burst out." is the bit that stands out most, here), and too much of it is dumping headcanon without being entertaining.
…but I still enjoyed this, more than I've enjoyed comparable work. I'd like to see this polished more, but I like the O5, I like the narrator, I like the weird distant aspect, I like the beginning and end, the descriptive passages (usually the first stuff I tell people to cut in a story like this) are well-written and engaging. And despite my critique above, a lot of the dialogue is good. The writing is strong, and while I don't like the structure used here because it's fairly flat, this is actually a really good example of it — better than the hundreds of similar stories I've read like it.
I especially like the closing line.
So, +1'd despite my recommendation to polish more.