1. His main element is Raiton and not Katon like with the rest of Uchihas.
2. He doesn´t have idea how to transplant an Sharingan eye.
3. He didn´t even have any knowledge about Uchihas jutsus like Izanagi or Izanami.
4. He failed to save Uchiha clan. If Sarada stay alone Uchiha clan name will die, if she marries to someone those childrens would have father surname so in both scenarios uchiha name will be lost.
5. He fall so low that Sakura had to save his life couple times and he ended up with her ,woman who couldn´t give him a son a successor of the Uchiha clan.
6. His brother killed entire Uchiha clan.
2. He doesn´t have idea how to transplant an Sharingan eye.
3. He didn´t even have any knowledge about Uchihas jutsus like Izanagi or Izanami.
4. He failed to save Uchiha clan. If Sarada stay alone Uchiha clan name will die, if she marries to someone those childrens would have father surname so in both scenarios uchiha name will be lost.
5. He fall so low that Sakura had to save his life couple times and he ended up with her ,woman who couldn´t give him a son a successor of the Uchiha clan.
6. His brother killed entire Uchiha clan.