Selfish for having boundaries

My mom and I never got a long and I was never really close with any of my siblings . I’m quiet and keep to myself. When I was In my teens, I was treated like a house help . I did every chores in the house despite having siblings close to my age . When I went to uni, I decided to set boundaries, and was called selfish . I ended up having a big fight with my mother. I remember, I came back after work and I was burned out since I had a bad day at work, and my mom was blaming me for smth I didn’t do, and I told her we can talk about it after because I had a really stressful day at work, she kept on pushing my buttons, and I knelt down, cried and begged her to leave me alone because I’m not feeling well and she said I’m manipulating her . I felt like I couldn’t get through her and I felt like losing my mind , so I started throwing things around me uncontrollably, screaming, crying. It was hard for me to stop … All the built in resentment abd anger was coming out . After crashing out, I felt bad and decided to go for a walk . When I came back home, she told me that her bag spoiled because of me, and I should buy a new bag within 24 hours . That’s all she told me. I decided it was time to leave and within 3 months after saving up, I left, but then she started becoming nice to me when I was living with roommates . She called me everytime, we jokes and laughed and then she told me to come back home because she needs help with rent . I told her I don’t want to, and she called me selfish and said she’s struggling and I should understand her. I ended up coming back because living with roommates also wasn’t easy, especially since I have social anxiety and I’m introverted . I always felt uncomfortable going to the kitchen and coming out from my car cuz I hate small talk and sometimes I hated being seen by my roommates especially after having a tough day at work . It was like I had to perform all over again when I just wanna come back home and hide . I decided to move back in and help with rent, and the house was dirty , my siblings are 19+ and one of them work part time (1-2 days, not in school) while the other only studies . I’m also in school but work full time and it can be hard to have time to clean the house . I told my mom that she should tell everyone to clean up after themselves out of courtesy, she said she has but no one listens. I hate dirty spaces so sometimes I clean up everything but because I am either at work or at school, the house still gets dirty quickly since my siblings are in the house more . I made a group chat reminding everyone to clean up after themselves . I also buy my own food because I’m picky and I need it for work, but my mom lied to my siblings and said she bought the food, because of this my siblings always eat and finish my food, so when I comeback home, I’m left with nothing . Like a few weeks ago, after a tiring day, I was happy to come home and to eat my favorite snack, and it was gone . It was a snack I was looking forward to, so I lost my mind when I saw that it was finished . I confronted my mom, and she said I should stop being evil and selfish and I should share my food with my siblings because that’s my responsibility as the oldest child . Mind u, my siblings are 19 plus. They have the capacity to work just like I’m doing . I never touch any of their things. That’s when I realize my mom would never change. I also made a group chat to communicate everything to my siblings about cleaning after themselves and leaving the food I buy because it’s food I also take to work, but they all left the group chat . Idk I guess I’m evil, selfish, and a complainer, but living with them is making me lose my mind. Pls don’t tell me to seek therapy, I don’t have money for that . I wanted to stay until the lease for the house ends because my mom needs financial help, but I can’t take it anymore . I’ve learned ppl only listen to action, but I prefer to live alone, however I won’t say I’m financially stable to live alone. Having roommates isn’t really my preferred option but it’s definitely better than living with my family . While I’m still looking and saving up, how can I survive this dirty family that doesn’t understand boundaries and call me selfish at every given time ?

TL;DR- No matter how much I communicate and set boundaries, my mom call me evil and selfish . I was living with roommates but she said she needed help financially and told me to move back in. While I was living with my roommates, she was nice to me so I forgot everything that happened, but when I moved back, the cycle began again. The house is dirty even tho my siblings are home majority of the time. My siblings eat the food I buy for work , because my mom said she’s the one that buy it. When I confront her, to stop saying that, she said I’m selfish and it’s my responsibility as the first child to share my food with my 19+ siblings. I plan on moving out again but while I looking and waiting, what can I do to get through this and not let it get to me cuz I feel like I’m losing my mind.