Listen I get JJ, I can understand where he’s coming from. Leo’s immaturity greatly affected their relationship, the fact that it took a breakup for him to realize hurts.
But at the same time, JJ could also just sit Leo down and have a serious conversation with him, Leo may be dense but he isn’t dumb enough to not realize his own mistakes (Even if it took him awhile) couples therapy is a real thing that helped people maybe they should’ve tried that