Roommate Advice

So I’m living in a 4-bedroom apartment-style dorm at uni. One of my roommates is a 5th-year who’s staying on campus because she needs accessible housing as she is in a wheelchair. But since she’s older, she acts like she’s in charge, and it feels like she treats us like kids.

She hasn’t contributed to any shared stuff for the apartment. My other roommate and I are the ones who buy things like dish soap, cleaning supplies, and everything else we need. The other roommate doesn’t mind, but it really bugs me. Plus, she has friends over every single day, from morning till late at night. I can’t focus well in libraries due to ADHD, so I’ve asked her to keep things quiet when her friends are here, but they keep the noise up, binge-watching shows from morning to midnight (seriously, they’ve gone through 10 seasons of Grey's Anatomy out loud in our living room).

When I ask her to quiet down, she just tells me to wear headphones. What’s more, they order takeout daily and leave their trash behind, which ends up piling up under the sink. Since I’m usually around more often than the other roommate, I’m the one who takes the trash out—every two days—because she says she can’t do it herself, and her friends somehow never offer to help. I finally refused to do it this week, and she texted the group chat saying, “someone please take out the trash, it smells,” after her trash bags piled up for days.

I feel like she’s taking advantage of her situation and expects us to be okay with it. I’m just trying to focus on midterms, but it’s like we live in a home cinema. Am I overreacting here? The other roommate doesn’t seem bothered, but I’m at my wit’s end and not sure what to do.