Some of It comes from the original myth
I don't like it either tho
I mean sure but clearly this isnt really following the plot otherwise. If youre gonna take liberties with a story might asw make a compelling plot instead of having a rape victim get similarly brutalised every arc
He's a god, not a human (even if he is full with human emotions). That's why I think that, from a "divine" standpoint, maybe we readers are supposed to get the impression Seth is going through is supposed to be like the opposite to what Jesus Christ's sacrifice is supposed to mean in Christianity: like, for example, if the devil one day decided to try for redemption. The whole point about what happened to Christ is that he certainly didn't deserve it, yet still willingly went through with it, in order to save mankind. Seth's sacrifice is the other way around (he needs to go through it in order to save himself, along with the souls of those specific number of humans that died because of him) but it can still be considered to be a sacrifice being suffered for a reason (to save Seth himself, along with those souls)
I think we're just ignoring the whole "gods are becoming more and more like humans in their imperfect ways" plotline and the core differences between most mythos and christianity.
Seth in this story had his agency stripped and was betrayed by everyone he was close to while being one of the first gods to yearn for a family. Punishing him for going back on his role as the protector of egypt by having him be forgotten makes sense because just like he killed countless people, he has to end his own existence now.
Him being sexually brutalised as a rape victim is crude, doesn't serve the plot in any manner and has only made the concept of Seth as the object of men's desire commonplace. Having one of the first and most human-like main characters be objectified like this is just genuinely disgusting imo.
Yeah. It IS true that, if Seth was supposed to suffer like this because of the human women's own sufferings with SA, then the author should've have SHOWN more of the SA the human women went through, rather than just implying it (I mean, if we're going to do "justice" to Seth's suffering by showing it whole, then going by the same reasoning, the characters of the human women should also get the same "equal treatment", with their sufferings being done just as much "justice". And by that, I mean: if we can't avoid the depiction of SA in the story, then let's be "fair" about it, and treat all victims the same. Because, if the author had given equal panel space tothe depicrion of those human women's suffering, showing their rapes, and how brutal those ALSO were (rather than just implying it), then I'm sure that fewer readers would be thinking of Seth as being "unfairly" objectified by the author. Because, the connection would then be a lot more obvious.
So, I DO agree that the resulting effect of the author giving so much "special treatment" to Seth's SA alone (compared to the women's SA) is that the author ends up giving a glaring focus on just the objectivitation of Seth, alone, which is probably a selling scheme as of now, just like you said (no matter if it did, or didn't, start like that, at first...). The author might even be doing it yielding to their editor's demands, unfortunately. It's sad.
Just one thing: the whole "gods are becoming more and more like humans in their imperfect ways" plotline is supposed to be a BAD development, not a good one! Horus said this means they will all disappear, and, so far, they're taking that to be a BAD thing. Sure, later on this might all turn out to be just headed to a type "open ending" that reveals to us that these gods will all disappear ONLY because they will suffer a natural human death, after all of them turn into ACTUAL humans... but that's just us speculating, at this point. Besides, it doesn't change Seth's ongoing need for redemption, since it wouldn't change the fact that, in the past in which he caused all that human suffering, Seth WAS, indeed, not a human, but a god, and making use of all the privileges and duties of being one.
I genuinely dont really like the concept that Seth has to suffer through SA because it's part of what he's made of egypt because it feels really weird when this whole thing was started by him getting SAd and all his whole support system failing him in the aftermath.
It also doesnt help that the most visceral of the attacks was orchestrated somewhat by Osiris and the rest are barely reasonable past that. Like everyone is already stuck cleaning the pieces of everything Osiris broke and then he shows up and makes thing even worse, where's his punishment?
I get the whole point is that Seth has to understand the victims of his rule, but like none of the SA was the will of the souls..? What even is the point then