The Dallas Cowboys are having trouble winning games on the field, and their fans aren't winning over anyone else in pro football.
A new study from MI Bets has found that Dallas Cowboys fans are considered the "biggest complainers" in the NFL.
They're followed by the New england Patriots, Buffalo Bills, Chicago Bears, and Philadelphia Eagles fans.
The people in the survey say Cowboys fans use what they call a "victim mentality," meaning that they're the victims of everything, from bad luck to bad officiating.
The study says Cowboys fans also complain the most on social media or radio talk shows about everything else that goes wrong with the team.
The biggest complainers on the field are not Dallas Cowboys. Most people say the worst is Tom Brady of the Tampa Bay Buccaneers, then Cam Newton from the Patriots.
The head coach of the New England Patriots, Bill Belicheck, is the biggest complainer out of all NFL coaches.