GLENDALE, Ariz. – Jeff Ulbrich is nothing if not a very noble and responsible human being.

The Jets interim coach not only fell on the sword for his team’s putrid performance minutes after his team was slaughtered 31-6 by the Cardinals at State Farm Stadium on Sunday, he dove off a diving board onto the sharp point .

Ulbrich said that after a nine-day layoff since their previous game (a home win over the Texans on Oct. 31), the team was unprepared on Sunday.

“We didn’t perform even close to our standard, and that falls 100 percent on my shoulders,” Ulbrich said. “I didn’t do a good enough job of getting these guys ready. I liked the physicality and effort. That wasn’t the problem. It was execution, and that was in all three phases.”

The Jets defense was a major culprit in the game.

The Cardinals scored on each of their first five offensive possessions.

Their quarterback, Kyler Murray, finished 22 of 24 for 266 yards with one touchdown pass and two rushing touchdowns and completed the final 17 passes he threw.

The Jets’ approach was terrible.

According to the NFL’s Next Gen Stats, they missed 20 tackles in the game.

They couldn’t cover anyone at the back.

The Cardinals collected 18 first downs in the first half and finished with 28.

They converted 5 of 7 third downs (71.4 percent) and the fourth down they went for.

What the… what gives?

“It comes down to our fundamentals, and obviously I’ve done a poor job of preparing for this team in that way: tackling, focusing, getting out of blocks,” Ulbrich said. “I have to keep trying to find ways to put them in a better position to be successful.”

There really aren’t any turning points in a loss like this, but a key moment in the first half occurred when Jets cornerback Sauce Gardner, whose tackling has come under scrutiny late this season, failed to get Arizona tight end Trey McBride . third and seventh completions in the second quarter.

McBride threw Gardner like a bull throwing a rider off his back and turned what would have been a botched third-down conversion into a 17-yard gain to keep alive a drive that would end in a third Cards touchdown and a 21-6 lead.

“I’ve got to make that tackle,” Gardner said. “It starts with me. I have to be better.”

Gardner was hardly the only one to blame.

“We have to work on it,” Ulbrich said of the tackle. “We have to get better at it. I thought we put a huge emphasis on it this week (in practice). We have to continue to go the extra mile, we have to finish, we have to get the people to the ball… the core of this game from a defensive perspective.”

Edge rusher Haason Reddick defended Ulbrich after the game when he was told he had taken the blame for his players’ shortcomings.

“Brick is doing an honorable thing,” Reddick told The Post. “He does what any coach would do, but it goes for the players too. At the end of the day, we are the ones on the field. We have the playmakers to make plays, and that is exactly what needs to be done.”

“You can’t put this on Brick. I’m not sure you can put any of it on Brick. At the end of the day, we have to be better for him.”