I want my deranged aunt out of the house

(Long rant) I live with my grandma because I’m still in high school but for fucking months we’ve all been so sick and tired of my aunt. She has no job, smokes, drinks beer, always asks us for favors with no return, and fucking talks ALL DAY EVERYDAY. We all believe she’s not well in the head. I mean, she thinks there’s gasoline in her veins and Jesus made the china in our china cabinet? Literally all day she talks about nonsense like this. She yells and wakes us up every night. We tell her to talk outside but then she fights with us saying, “Stop telling me what to do!” She barely does anything but talk and talk and I swear I’m going to go fucking nuts. All the fighting and yelling, I just want it to stop. I’ve been hanging out in my car for hours everyday just to get some peace and quiet. She has no regard for others and smokes everywhere too. I can’t stand it because I can hardly breathe with it around. Not to mention, we can barely afford groceries but she literally drinks a pack of beer in three days and 6 packs of cigarettes a day. If we can’t get her her “necessities,” she’ll get mad and yell and honestly sometimes I’m afraid for my own well-being. But usually she just steals money from us and uses our cars without our permission to get it. We’ve opted just to hide everything but somehow she finds it. I’m just sick of it.

We called the cops once because of a particulary aggressive fight between her and my grandma but they said they couldn’t do anything unless she hurt herself or us. Wtf?? My aunt refused help from the ambulance and of course she acted completely sane when the cops came so it seemed like there was no issue.

I just can’t stand it. I have school to focus on and I can’t do my fucking work with her yelling. She used to be my favorite person when I was a kid but now I don’t know who the fuck this person is. She’s causing all of us to stress the fuck out and I want her gone.

We’re thinking of getting a lawyer and evicting her but what is she supposed to do elsewhere? She’s a recluse and literally knows no one besides our family. We thought about putting her into one of those homes but they basically told us it was our problem, not theirs. So what are we supposed to do? Let her drain our money and our mental health?

I feel like a fucking villain for saying all this but I don’t know what to do. It’s so draining.