Well, 'Worst Roommate Ever' isn't based on a true story. It's a work of imagination crafted by the writers to keep you on the edge of your seat with its drama and suspense.
A very inconsiderate roommate could be part of a worst roommate story. For example, they might play loud music at all hours without regard for others who might be trying to study or sleep. They don't seem to understand the concept of shared living and respecting others' needs.
I once had a roommate who would always bring unannounced guests over late at night. They were noisy and would use our shared stuff without asking. It was really disrespectful to my privacy and property.
Well, in one of those bad roommate situations, my roommate used to bring over unruly friends all the time without asking. They were noisy, smoked inside when it was not allowed, and left a horrible smell. It was a constant source of stress and made it difficult to relax at home. I had to talk to my roommate several times about it, but they didn't seem to care.
Well, my worst roommate was always so messy. He would leave his dirty clothes all over the place, in the living room, on the kitchen counter. It was disgusting. And he never cleaned up after himself when he cooked. The whole place smelled bad all the time.
I knew someone whose roommate was extremely noisy at night. They would play loud music or have friends over late, not caring that others were trying to sleep. The person tried to talk to the roommate about it, but the roommate was very rude and said they could do whatever they wanted in their own place. This made the living situation unbearable for the other roommate.
The lack of respect for personal space is the worst. For example, if a roommate constantly barges into your room without knocking or uses your personal items without permission.
Lack of cleanliness is a common one. Like dirty dishes piling up or not taking out the trash. Another is being noisy at inappropriate times. Also, stealing or using others' things without permission shows up a lot in these stories.