Its not comfortable to listen to that dialogue scene. But isn't the dialogue "true" to the character of the Hound? He isn't a good man, he may have improved over the last few seasons to be "less evil" but we all acknowledge that evil men view rape as not "something wrong" in their own viewpoint, right? So for him to casually say those things to her seems more authentic and real then him saying something like "Its horrible how Ramsey raped you, do you want to talk about how it affected you?".
Then from her perspective, it seems more in line with her current character to never show any weakness to anyone who could be an enemy, learning from Littlefingers little "assume the worst of everyone, the worst thing they can do, and you will never be surprised". So she has to say things that minimize it, always emphasize how much stronger and better protected she is now, and make it clear she is a very different person now than before.
Not sure what people expect? Sure, you could reasonably say you expect the show to never deal with rape (but is murder ok?), and you have every right to stop watching the show because of it. My wife doesn't watch, after season 1, because she didn't like the way women were treated on the show. But I think to say that characters should talk and act in a way that is not true to their nature would make for a weird show.