They make these micro celebs do the most embarrassing things for a small chance at fame. It's demeaning, dehumanizing, and exploitative (except when the microceleb is some nepo with nothing else to do)

But more importantly it's just bad writing. Most of the "reality" shows I've seen have the actors ab libbing within the thinnest tracks of whatever narrative the director wants to push. The narratives are often racist or some other brain worm laden rot.