Because the teams they have played ...and beaten, this year had an average record of 5-11 last year. Those teams MAY have a better record than that THIS year but they also would have a weaker schedule this year based on their record last year.
NFL strives for parity plus we all know Jerry Jones is a loser.
Even so, Dallas has managed to beat them with a rookie quarterback and running back, which would be a feat for any team. It’s hard to argue against 10-1,even if it’s just because you don’t like the team.