For anyone who wants to argue about "sample size" or "bias",here are the rankings for the entire 2018 season:
https://www.teamrankings.com/nfl/stat/red-zone-scoring-pct
30th. For anyone that can't bear to open the link or to see the awful truth. The Cowboys rank. 30th in scoring touchdowns in the red zone. Oh, but that's "up" from being ranked 31st last week, so there's that.
Fact is that this offense has been and continues to be poor at scoring touchdowns. And ultimately, scoring is all that matters. When the dust settles and the game is decided, it's all about who scored the most points. Not yards, not big plays, not turnovers. Points. And touchdowns and extra points are worth 7, and field goals are worth 3. And failing to score = 0.
This has been this team's biggest issue all season, and it actually goes back to include last year. And none of the coaches charged with this offense has been able to find answers in all that time.