Do I look weak?

I am not too happy with my current living situations and I cannot move out as I do not have enough income for that. I live with my aunt and her difficult 18 year old daughter who had been diagnosed with opposite defiance disorder. The daughter is really rude and disrespectful a lot of times to her mother and me I cannot stand it. A lot of times I try to brush it off but if it really pisses me off I will get involved and things had gotten physical. For example since I came to stay with my aunt I have been sleeping in her bedroom and it seems like she hates me for it. She once got angry with me and threw everything I had out of the room onto the floor my clothes, my laptop my shoes etc. I feel frustrated with her because I do not know how to live with her and not have bad thoughts about her as a person. She is doing horrible in school, there is never quiet in the apartment she is always dancing and singing and doing things at weird hours such flat ironing her hair at 4 am. Dancing at midnight.

I am 24 and I have been praying God to help me. Finally last night I lost it. I have a test to take in a a few days and I was trying to study I had went to the library all day and came back at 5 pm and she was watching tv loudly, then listening to music. Then when my aunt came home from work I thought the noise would died down it did not and my aunt clearly saw that I was studying. Then I thought to myself maybe I can go to sleep and wake up at 2 am and study while they were sleeping. But she was still watching tv at this point its midnight and I couldn’t fall asleep finally I asked my aunt can you make her turn it off and that’s when she decided to play music and dance. Then my aunt was like trying to make her stop and she hit my aunt. I was boiling at this point so instead of interfering I lashed out and starting throwing my books around, my laptop on the floor and punching the bed and I started screaming and send a lot of things and cursed her out then started crying. When I exploded my aunt was like you are throwing your laptop and stuff I do remember saying what’s the point of having a laptop if I do not have a live there is never peace in this apartment. Because honestly my aunt and her are always fighting and always arguing.

The girl kept on saying to my aunt stop giving her attention let her let it out and she had also said to my aunt that my family was brainwashing. I then had screamed if we were brainwashing her no one would of known would who you are.

Do I look weak now in front of the 18 year old because I broke down like this? How can I try to coexist?