That was the basic problem with TLJ’s writing. The bathos. Every serious moment had to have a silly manchild moment to break the tension. Lucas had a bad habit of this too, but not nearly as much.
Talk about it. It seems like Rian ignored the first rule of works that mix drama and comedy: The amount of comedy decreases with the amount of drama that’s going on. The OT followed that rule to great effect, only cracking jokes when there’s not much dramatic stuff going on. In TLJ, comedy is just randomly inserted into dramatic scenes, and it kills the tension as a result.