What Sasuke is doing, will make Itachi sacrifice for nothing. Whats he going to do after he destroys Konoha? Will that be enough for him? Or will he seek to destroy the whole planet?
clearly you dont understand how inconsolable rage works
basically, its inconsolable :| , there is no peace for him, no future, no logic, no after, the only thing he knew as a child was ripped from him, theres no reasoning and no prior purpose of it that will justify what happened
youre trying to understand an emotional and irrational path with rational thought process
edit: saw your changes, granted, no one is trying to say hes a well adjusted adult, we all agree hes dysfunctional , but his situation is different from yours, in that his entire family was murdered, by the person he trusted/loved the most, then he was tortured with recurring mental images of the murders[tsukuyomi] at 5 years old, with no reasoning or understanding he grew up with that knowledge , ran into itachi again, got another dose of tsukuyomi just for good measure at 13 ish, no big deal, its only mind shattering mental torment , then he finally kills itachi the one thing thats been the driving force in his life, thats defined his existance, and he comes to find out it was a set up for the good of the village
given how fked his head is at this point, you should be able to see why hes just like " fk the village" he has nothing left as a human being, revenge is it, attachments are over for him, which is poetic because thats why naruto is the only one that might save him