Most animes are not inspirational. That doesn't mean they're not good, they can be really good but to be inspirational is yet another optional step to connect with a certain audience. The reason I like SAC 2nd Gig is because there is really no one "bad guy" that must be vanguished for the world to make sense again and morality to be reinstalled. The world never makes sense from the very beginning, and it continues to be enigmatic up until the very end. Some people would call this an unresolved story. I call it a genuine emulation of the real world. A world where even though teamwork and communities work hard to bring about a better world, individuals still feel very lonely. Isn't that everyone's real dilemna? Even with so many friends, why are we so lonely? The fact that our behavior is fueled primarily by neurochemical stimulation and plasticity does not make this existential crisis any better. What do we do? Some of us resort to fables and fairy tales to get some sleep at night. Others become megalomaniacs (Kuze, Gouda). Others try to restore (install) some sense of justice to the world (Motoko, Batou and Section 9). Others put all their efforts into worshipping and following a hero (refugees). Believe it or not, some people just withstand it and go on with life disregarding all injustices and just attempting to live a life of comfort and security. (Japanese citizens, Nietzche's Last Man). It is very evident solitude is a key theme in SAC 2nd Gig. It is also evident the writers of this show are very erudite. In a way, 2nd GIG is like a pastiche of real life and various existentialist works (I detected abit of Nietzsche, Sartre, Dostoevsky, and Kierkegaard).
If you're a fan of overthinking plotlines and creating structures and comparisons that never existed in the first place. This is a gold mine. If you just want a good anime, this is also a good anime. But I urge you to let it tickle your brain a little. Let it create a spark.