*spoiler*

If you mean the assault scene i felt it wasnt actually as "gratuitous" as people were saying. I think the length was necessary to present little differences between each character's version.

It had little nuances between each person's point of view when it was their turn to tell the story. (The way she half closes the door in one version vs fully slams it, the way she laughs in one version vs not a single laugh in the other, the way she playfully kicks her shoe off vs it falls off because she is running for her life, how she says no playfully vs begging no)

I think Adam Driver's character legitimately believed it wasn't a rape, even though it obviously was. He was so evil and out of touch he died thinking he didn't do anything wrong.