cabin baggage

Flight attendants are federal safety officers, not service staff. Under 14 CFR Part 121, their legal mandate is emergency evacuation and cabin safety not your carry-on. Arguing past a refusal can trigger a federal offense under 49 U.S.C. 46504. Know the rules before your next flight.

The bin above your seat is full. Someone in Group 2 put their bag there. You're in Group 7. This is not bad luck it's the system working exactly as designed.