So first off, control what you can control.
Can you control your partner, no?
Can you control your body language and reaction to all the drama? YES
Work the game like a professional.
Get off the field and into the locker room, if no locker room, then have the discussion later.
But I feel that you need to give your partner the feedback that you would tell your assigner.
If he doesn't want to hear it, great, then report back to your assigner in a very neutral way, what happened, stating facts.
If you assigner wants more, let him call you.
Then if you have the option, go in and block his ass.