Seriously they are -Yoink!- me off. If they’re not shooting me in the back or driving me off a cliff, or giving away my position they’re stealing my kills. I want to kill them! I know I’m dreaming but if bungie could add an option to disable friendly AI I’d enjoy this game 100x more.
While your original request is not possible, might I suggest playing on Legendary?
Most of the friendly AI is bound to be killed except for your Spartan teammates.