I watched it the other night, I am kinda conflicted about it but still loved it.
(Spoilers ahead.)
To me, the basic idea of what it's trying to say is that a woman is trying to assert herself and her own independence outside of a man's influence.
At the beginning, she's created by a man. A man is telling another man he has his permission to marry her and take ownership. A man offers her a way out of that to go on her adventure, but on his terms. As she matures, she starts realizing she can make her own choices and eventually takes ownership of her own life and kind of puts all these toxic men in their places.
I loved all that, but I honestly felt a little awkward having to sit still with a bunch of scenes that realistically should have gotten this movie an NC-17. I get it that you have to show her owning her own sexuality, but to me it just was so over the top about that that it felt like it eventually detracted from the point. You can show a scene or two and then just leave the rest to the viewers imagination. I get that. And maybe it was intentional to make the audience a bit uncomfortable with that, but it just didn't work for me personally.
Overall though, I still really enjoyed the hell out of it and totally get why it's a Best Picture nominee. Emma Stone absolutely rocked that role, you totally end up rooting for her to take that agency and ownership and she comes out on top in such a satisfying way at the end.