I agree with you here. feels weird for me when the goal is to have sex with men. but hey to each their own.
I would say if its a female protag the writing needs to be better for me to stay interested.
Your model may not have been trained on monsters/tentacles that aren't octopi. If you have tried several different prompts and it still doesn't work, you may need to find another model.
Find something worth caring about and you'll get out of it. The human condition is well documented in literature, It might give you some perspective. I would read dostoevsky or tolstoy. mans search for meaning is also good, don Quixote is a classic as well. I promise you these feelings are...