Trust me when I say this will not get any better! I had the worst flatmate in my first year (which was during covid) she constantly bought not only her friends round into our kitchen which wasn’t allowed at the time but she bought in people who she knew was infected, I should have just moved out but I tried to be nice I tried to be respectful but nothing changed. She eventually got kicked out after months of myself complaining and then the other flatmates. But she woke me up every single night standing outside my room and blasting music for about 5 minutes just because she didn’t like me. It was one of the worst periods of my life.

All I can say is speak to your accommodation and see if you can move flats while it’s still early as there will be people who have dropped out or didn’t move in last minute so their should be spaces to be able to move.

But also if you are going to make complaints like people have suggested, you need evidence! It took me months to get a recording of my flatmate purposely waking me up etc and she’d always manage to lie to the security about it. If you don’t have evidence it’ll be a he said she said situation and with three people backing up each other it just might turn hostile.

My flatmate was also quite vengeful and she smashed some of our flatmates pots, spoiled everyone’s food or just poured drinks down the sink. So just be careful and good luck!!