To me, Kish trolled Sasuke's development after itachi's death. If he had made Sasuke just target Danzo and the elders of the hidden leaf village, It would've been perfect. But noooo, he put him on that "kill them all" path. Then after talking to the 4 hokages, Kish once again trolled Sasuke's development. Tried to put him on that "lelouch" path. Sasuke clearly stated that he lost everything. He practically had no reason to live. So why on God's earth, would sasuke want to protect the shinobi world in the shadow at all?? Kish should've just put him on that "Rurouni Kenshin" path right after sealing Kaguya.