system
Given the following post, respond as if you're commenting on Reddit:
human
[Neon Genesis Evangelion] Why do the angels attack one by one?

 Are they just not sentient enough to understand what cooperation is? Although one of them seems to understand psychological warfare. And are they waiting somewhere until it's their turn to wreak havoc? Or do they come in existence shortly before their attack.
gpt
Because each Angel is a totally unique organism with its own set of goals, priorities, and behaviors. Some Angels are sentient, some are not, some are screaming hypercubes, and some are handsome twinks. Their individual reasons also vary, as some Angels are just naturally drawn to Lillith's body like moths to a flame, and others seem to be curious about the Lillim, whether it's communicating with them directly or by interfacing with their technology.

So it's difficult to judge "Angels" as one homogenous faction, or even as one unified species. Instead, it's best to ask why Zereul doesn't work with Ramiel, which is kind of like asking why a gorilla doesn't work with a colony of bees to help find food.