Mmmm.... I really think I understand those horrors. I tend to doubt that the followers of GOT are repulsed by the horrors.
Possibly not, but that doesn't change the authorial intent. Martin's a pacifist hippie who has directly stated his intentions.
Compare to your incredibly common stories out there (especially in fantasy) where war is portrayed as glorious and just, a side of pure good fighting against un-redeemable evil.
Compare to Tolkien who (while he is a great author who accomplished his goal of writing a story in a mythological style) portrays war as a fight between good and evil. There are no redeemable orcs, and there is maybe one person fighting on the side of the good guys who is immoral. None of that is Tolkien's fault, his writing was trying to emulate the classical sagas which didn't exactly have complex morality to their battles either, so it's just a result of the style and medium he was writing in, but I'd think it
far more destructive to present war as a thing where Good Guys fight Bad Guys and everything is simple and black and white.
Martin instead in his books gives us wars where there are horrible people on all sides of the war (even on the side of the heroes), and politicians are causing massive amounts of death, destruction, and hardship on the commoners for ultimately petty reasons while largely (except for Stanis) ignoring the looming existential threat of ice zombies. [Also a blatant and obvious climate change metaphor.]
The show is notably less good at this portrayal of war as hell than the books are, but even now in the show when everyone has acknowledged the need to band together to survive, we have characters like Sansa whining and complaining about petty concerns like titles of nobility while death itself marches towards them.
But of course you've not seen the show nor have read the books, so you've got no idea about any of this and are speaking from a point of inexperience.