Why Does One Coworker Basically Run the Shift Without Being a Manager?
Humans are hardwired pack animals, they follow whoever controls resources and information, not whoever has the title. That's why the shift runs on unwritten rules instead of the org chart. Three things are happening at once: social proof, everyone copies whoever acts certain because uncertainty feels dangerous, information asymmetry, whoever's been there longest controls the schedule gossip and who's actually in good with the boss, and the halo effect, tenure gets mistaken for competence so people just assume they're in charge. The badge on their shirt means nothing, figure out who actually controls your hours.
What's actually happening
New hire clocks in, reads the room fast
One coworker decides breaks, not the manager
Everyone defers to keep the peace daily
Cross them once, your good shifts vanish
Who actually controls your shift
Nobody tells you who really controls your schedule, and by the time you find out it's already decided.