His offenses will always put up numbers because he's pushes the pass. But his offense will always fail in tight situations. Because he's not a good playcaller.
Let's look at what happened since he started calling plays. If you doubt me, go look at the numbers.
The OL started giving up more sacks. And it starts with the OL because the Cowboys drafted and built a OL that wanted to run, they drafted the rb to run. But Kellen wanted to pass. Idc what stat you want to throw out about the team running the ball alot. Use context with that and you get the whole story on that. You can have a 16 play drive which Dallas has had plenty of. He'd run it say 10-12 times and they just blow up the defense. That's probably 1/3 of the teams carries or that game on that one drive. The following drive what would typically happen? A 3 and out with no runs. Running the ball was an inconvenience for him. MM basically said it without saying it, rather saying they had a differing opinion on philosophies.
Elliot was tearing the league up before Kellen took over. He had 1631, 987, 1434 yrds in his first 3 yrs. The 987 season the nfl had its witch hunt. I think they win the superbowl that yr if the nfl doesn't destroy their season. Kellens first yr he depended on Elliot and again tore the league up with 1357 yards 12 tds 54 rec 420 rds and 2 more ttds.then 2020 came and Moore went pass stupid from that yr on.
Ok so Dallas had a OL built for running the ball and a qb who had benefited from that and controlled games much like Purdy and Hurts do now. But Moore wanted mahommes and the Chiefs. That's not what this team was built for. So the OL started giving up more sacks and dak started turning the ball over more. All starting in 2019. The yr Moore took over the offense.
When you have 3 elements of your offense starting regressing all in the same yr, it's pretty easy to see what the problem was. Granted Jerry deserves most of the blame because he forced Moore on MM. So he enabled a guy that the job was too big for.