I love ROTJ and Luke’s story in it, but his “temptation to the dark side” is one of it’s most poorly handled elements. Maybe on paper his actions at Jabba’s palace seem like he might be slipping to the dark side, but they ultimately play the sequence as completely heroic. His “temptation” is never explicitly a struggle for him until the throne room, and by then he’s been the hero for so long the idea that he might turn has strains credibility.
TROS is a much worse film, but at least they show moments where the darkness explicitly gets the better of Rey. It’s one of the few ways that film works much better than ROTJ.