I mean, age of attraction is different for everyone and tbh I don’t have an “absolute” problem with a 33yo consensually hooking up with a 18yo. To me, it’s simply as weird as hooking up with a senior citizen.
But as this case once again shows, often times the people who go for much younger ones are ignoring when those feel uncomfortable, are not willing to consent, and keep pushing for something. And that is straight up inacceptable.
I imagine that HR at some multicountry conglomerate is not your friend. In the middle-sized companies I have worked at HR has been quite supporting when needed. Of course it is also a question of what kind of stuff they are responsible for. For example, bullying is not an HR topic here, there are specific other people for that.