You might be talking about fighting against a CV Bot in Co-Op or Scenarios. There ability to aim was improved as the AI was updated.
If you need to learn about how you avoid rocket strikes, I did a video series describing how to deal with Tier 8 CV Bots.
Shokaku
Lexington
Implacable
Parseval
The links above work, but here's an in-post option for the Lexington one: