Not sure if you want a serious answer or not, but the Rin'negan is not an Uchiha eye. It's not exclusive to anyone or any clan besides Hagoromo, given that his chakra awakens it. A Senju or Uchiha (more specifically descendants of either Ashura or Indra) have an equal chance of awakening in the Rin'negan should the mixing of their chakras happen. And Hashirama barely handling EMS? You mean EMS w/ Kurama to which he still won. SM Hashirama vs EMS Madara without Kurama is an absolute stomp. Naruto can't handle Rin'negan Sasuke? You mean Rin'negan Sasuke with the power of all 9 Bijuu... Without it, the 3 Avatar clones would have effortlessly destroyed Sasuke's prior Susano'o and naruto would have won.