Here's a breakdown from an audience review off Google; since you can't hyperlink google reviews I'll quote them. It's the best review and understanding of the movie I've seen thus far.
Christen Warrington-Broxton
"We need to talk about the last 30 minutes of the film because a lot of reviews and comments either skip over that part or brush it off as "weird."
There are folks claiming the ex storyline was never resolved. Think about that next to last scene with the reborn tocksick msclnty (TM) blameful ex where our heroine is clearly calculating how she will dismantle that mess with the axe.
There are also folks who think the most grotesque and symbolic scene of gory birthings makes no sense. Again, you have to get into the meat (ew and lol) of that scene. It's slap-you-across-the-face-obvious commentary on how men reproduce, or rebirth, the TM that was passed onto them, even down to the traumas, or wounds.
It may even be that this scene is commentary on the Green Man even existing in mythology is so utterly grotesque. It's obsurd and inherently patriarchal that a man has been carved into stones and wood around the world as a symbol of nature and rebirth, when clearly women are the only human beings capable of birth. On the opposite side of the stone is the Sheela-na-gig, a figure on whose role scholars cannot seem to agree, which is hilarious considering they managed to figure out the Green Man.
One interpretation of the Sheela-na-gig is that she symbolizes pain, a salient message for the film. Yet, focusing just on facts, these pagan carvings highlight a theme among religions, even pagan or tribal religions that are commonly mistaken to all be matriarchal in nature: the reduction of women. The Green Man carving focuses on his face while the Sheela-na-gig focuses on the lady parts, highlighting just how long men have been reducing women. And, it's deeply meaningful that these carvings are found in one of the single most patriarchal and TM places in the entire world: a church. Frankly, just about any major global religious place of worship would fit the scene.
The gross scene takes the idea of the Green Man and turns it on its head, as if to say when men do give birth to something, it is the consistent, even monotonous rebirth of generational torment and trauma, eventually causing the woman in the scene to lose her initial shock and horror, and become oddly numbed.
The onslaught starts with the Green Man, the oldest stealing away of women's power, going through its many itterations. There is the plain old attacker. The policeman who lets a man go. Besides, all the man did was attack a woman. It's not like he stole valuable property, insinuating women aren't as valuable as property. We also have the passive aggressive nice guy at the bar who forces himself into buying women drinks women dont want. Forgiving the likely mistake in order, they bring in the angsty teenager, thinking a woman owes him her time just because he asked nicely at first. And, without fail, they bring in the religious leader who blames the woman for the abuse of a man. All giving way to the final man, the one who threatens to X himself if his wife doesn't stay with him, the man who violates his wife's privacy to talk with her friends about the emotional abuse, escalating to physical abuse, and the final foolish accidental fulfillment of his own threat when he fails in forcing his way back into her life.
The modern woman walks away from the inevitable and pathetic rebirth of toxic masculinity that comes for her: the ex. She goes to wait to prepare herself emotionally, and physically with the weapon her female friend pointed out to her. She must destroy this presence in her life.
Now, did I leave the theater asking myself if this would have even been produced if a man had not written it? I sure did. And isn't that the ultimate point?"