Kingdom hearts 1 was a coming of age story with some fantastic elements tossed in

Kingdom hearts 2 was about antipathy and how it destroys the world, with some, uhh, who was that guy? And why’s the bad guy on my side?

Kingdom hearts 3 was, wait, why was he cloned? When was he cloned? When was she, and him, and him again? And his third clone was a girl? And whose heart was imbued into what? What war? What? Who? What???