They were an abysmal team--and I agree that they were both stubborn. I was expecting Ben and Jessa to be the worse team, but they worked better together than Josiah and Lauren did. Their dynamic basically seems like he can't read her or chooses not to, she reacts in the most toxically passive-aggressive fashion imaginable, and then he responds by spinelessly groveling, which just makes her even more passive-aggressive. It wouldn't surprise me if his ignoring her and then groveling is passive-aggressive in its own right if only to get martyr points with any onlookers or for pending fights.🤣 ("You didn't listen to me!" "Well, I was the one who read the vows into the damn phone--where were you?!")
To be fair to her, I imagine there are issues on both sides, but they were acting like a jaded middle-aged couple on the verge of divorce in an Edward Albee play instead of relative newlyweds.
And yes I suspect you're right that she expects him to react any way except the way he acts.