I think the manga message is "It doesn't matter if you had a shit life and is a batshit crazy person, you will always find someone as fucked up as you to fall in love with" lol
This shit reminds me those serial killer couples, literally a folie a deux.
I knew it she was the source of everyting bad happening, It's over and they are trapped until the cycle repeats inself.
But I hope that not happens tho, I want to them both to be free, but after this their lifes are pretty much over.
I hope to God that Gomi doesn't defend her or love her after this, she ruined his life really bad now. This filthy wh*re doesn't deserve love after something like this.