Perhaps you are working frosh/JV because you are admonishing your partner for something that you contributed to. Did you ever stop to think that your, "That's five on #30," had an impact on him calling it on a different player?
You also warned by threatening, which is a no-no.
You also allowed the coach to use the old divide and conquer bit on you at half court.
I think you are the reason you are doing Frosh/JV on a Friday night.