Yeah, it would have made a helluva lot more sense if Harrag had tried the groin kick, then Theon smiled and RETURNED a groin kick that knocked Harrag back so Theon could whack him with a rock.
Or better yet, write in a whole backstory about how the Ironborn settle issues of authority via cock-punching contests and that’s the real reason they fear allowing a woman to take command, since she’d be nigh invincible.