Try reading actual literature. Or if you can't stomach that, try reading some of Asano Inio's works. Despite the fact that I really wanted to ignore the shortcomings of SnK, it simply went downhill midway. Introducing "deep shit" and mishandling it can easily result in a pretentious work, which it did. The intellectual level at which the problems are analyzed is something worthy of a teenager's fan fiction. So if anything, adding such elements just hurt the story in the long run. But that's just my opinion.It's not a perfect story, but it's much more interesting than anything going on rn. and like i said, the themes and symbolism deal with deep shit. Like, nature of humanity, morality and ethics, the nature of war, history and violence.