Spoilers:
Many reviewers don't get the powerful release of her working through her personal grief in the film. The simple ending, "i want you to love me", and her going, "I do". Even after seeing that all the horror that this creature, representing masculine energy in her life, specifically her husband's, had to bring her, she recognized that she did love him on some level, even if she didn't want to be with him. That's what working through the layers of complex trauma and grief look like.
Yes, there's a commentary on patriarchy if you want to see it that way. But if you're looking for that, and you're looking to get mad about it, of course you are going to have a bad time.
I personally loved it. ESPECIALLY the body horror. Hell there's almost a sense of cosmic horror. Great film