People get very possessive over their accommodation! I don't know if I'd exactly call it a rivalry, but you get very attached to where you live. Everyone knows that it's not 5* accommodation or anything, and complaining about where you live to people who have shared a similar experience is almost like a bonding sort of thing! The larger accommodations have picked up nicknames that reflect this, so that's why you get 'Talybronx', 'Senghetto' and 'Uni Hell'.
Don't take the nicknames too seriously!