I feel like it needs to be repeated a g a i n that the original Inuyasha series (s1-Final Act) had:
B*stiality/Monsterfucking
Grown men propositioning children
Grown men marrying children
Kidnapping with intent to r@pe
As part of its established setting/narrative and nobody batted a fucking eye:
Miroku outright asked a 13 year old to bear his children when she "came of age". It was frowned upon by a few other characters but also played off as just "part of who Miroku is, the old lech, like father like son! Lol" and in the end everyone just moved on
Miroku also sexually harassed his future wife, Sango, COUNTLESS TIMES, again, as an ongoing joke
Koga, an immortal wolf monster, told a wolf monster CHILD that when she grew up, he was going to marry her.
And then he did. And then he DID.
Crickets. Absolute silence.
Inuyasha, the protagonist of the show, the 200 year old spawn of a sweet human lady and an immortal dog monster, made out with/declared his love to: an 18 year old priestess. AND her 15 year old reincarnation. Multiple times.
Then he married the 15 year old reincarnation when she was 18.
Awws and clapping. "Inuyasha is a great show, there is nothing weird about it, this is my childhood!"
Sesshomaru, a 600 year old immortal dog monster and the fandom's Stoic Murder Husband, marries the 18 year old woman he protected for less than a year when she was a child, after leaving her with humans to live a normal human life, with absolutely no solicitations or expectations on his part. They have kids who are the protagonists of the sequel series.
Fandom Chaos ensues: "Yashahime is ruining my childhood", "I am uncomfortable and disgusted"
Now? Now you're uncomfortable? NOW?
Okay. Maybe sit with that and think about what exactly it is that's upsetting you. Because it certainly doesn't seem to be the cultural setting established by Rumiko Takahashi from the jump.
It might be, instead, you being mad that Sesshomaru, the Hot Badass of the Fandom, isn't a single-murderous-pringle anymore, and/or didn't marry the person you shipped him with.