characters motivation really confusing

Rating: 5/10 (22 December 2019)

Watch the new trailogy, not quite understand some character motivation in the new movie. For instance, why Kylo Ren want to rule the galaxy in the first place, why he want to rule with Rey. Why Kylo Ren turn back to Ben Solo after fight with Rey and see Han Solo force ghost. The entire trailogy didn't put much effort into character and charater relationship development.