Kylo Ren makes no sense. you can understand Anakin's fall. He was older when he started training. His master was a novice. And the Sith had been considered extinct for a long time. The Jedi became arrogant and complacent. But Kylo Ren came along right after the fall of Palpatine, Vader and their Empire. You would think the danger of the Darkside would have been drilled in. I cannot see a motivation for his fall. I read somewhere the novel claims it was Daddy issues. Daddy doesn't live up to his heroic legend. At least he doesn't kill every Imperial Redshirt who fails him. He just cuts rooms to pieces with this unstable light broadsword. I guess since he struck his father down, his journey to the Darkside is complete. Actually I'm more interested in learning about his master than I am about him.
I'd say Luke was a novice trainer as well.
For me, it seems Kylo Ren found the Dark Side exotic.