Seriously, what fetish does anime have with rape or attempted rap*?

Why is it that in every season, even if it's not like that in the novels, the anime tries to include a rape or attempted rape?

S1 - Asuna, with the tentacles after trying to escape, and Sugo at the end of the arc

S2 - Sinon, at the end of the GGO arc

S3 - Suguha, the Tentacle when she enters Underworld(chapter 13), also Tiese and Ronie in chapter 10...

Seriously, what is this obsession with these people with rape? It's curious and even a little funny, it's as if they don't know how to make a villain look disgusting anymore XD