The problem is not that this is a new problem.

The problem is this is a recurring problem.

The problem is not that it happened again on Thanksgiving night. The problem is it has happened on so many other days and nights, at home, on the road, overseas, wherever the Giants strap it on, lace ’em up and take the field. The problem is their consistent ability to avoid the end zone and their irrepressible inability to put points on the scoreboard.

What transpired in the 20-10 loss to the Redskins at FedEx Field was a lowlight but not an aberration. The Giants’ offense produced three points, embarrassing, but not unprecedented. Ben McAdoo has been the head coach of the Giants since the start of the 2016 season, and in that span — 27 regular-season games — only the Browns and Bears have scored fewer points per game than the Giants.

And before anyone wants to travel the “Well, Odell Beckham Jr. is injured” route, remember Beckham played and excelled in all 16 games last season and the Giants lost the two games this season in which their star receiver was near full health.

With McAdoo as head coach, the Giants are last in the league in explosive plays — pass completions of 20 or more yards and runs of 10 or more yards. They are 29th in yards per game and 31st in third-down efficiency. Essentially, the Giants cannot move the ball, possess the ball, gain chunks of yards with the ball or carry the ball across the goal line. In the past 17 games (including one playoff game), not once have the Giants scored more than 24 points.

Last season, the Giants won 11 games and made the playoffs based on their surging defense and ability to win close games, certainly not on the strength of their 19.4 points a game. They were a bad offense in 2016 and are worse in 2017, averaging 15.6 points per game.

“You don’t want to be one of the group that is contributing to the losses, and that’s what the offense is right now,” Eli Manning said Friday. “We’re not doing our part.”

This will not bode well for McAdoo when it comes time for ownership to say yea or nay on his return for a third season. Remember when co-owner John Mara famously declared the Giants’ offense was “broken” under Tom Coughlin, ushering in the hiring of McAdoo? Well, it’s broken again — or still.

In his two years as an offensive coordinator, McAdoo’s attack was worth watching as it was improving. In his 27 regular season games as a head coach, his offense is unsightly. Injuries have robbed this year’s team of the talent needed to compete at a high level.

This was the 1,300th regular-season game in Giants franchise history, and without poring over the previous 1,299, it is safe to state this was one of the shoddiest and most embarrassing offensive performances in the 92 years in which the team has put players on the field and asked them to gain yards and score points.

The 170 total yards was the lowest total for the Giants in more than four years, since they had just 150 in a 38-0 loss to the Panthers on Sept. 22, 2013. They had one first down in the second half, and the seven total first downs were the fewest in a game in nearly 11 years, since they had six in a 30-7 loss to the Saints on Dec. 24, 2006.

“Everybody feels bad about last game,” Manning said. “That was bad football offensively. That was not anywhere close to what it needs to be.”

There’s more. The 86 net passing yards was their lowest total in more than 10 years. The 2-for-14 conversion rate on third down (14 percent) was the worst all season. In the second half, the Giants had 47 total yards of offense, and more than half of that paltry total came on a garbage-time 27-yard completion.

Before they stunk up the joint in Landover, Md., the Giants were the most slippery-fingered team in the league, with 30 dropped passes for a dropped-pass rate of 6.9 percent, putting them ahead of the 49ers (6.3 percent), Raiders (6.2), Bears (5.5) and Colts (5.4). The wide receivers Manning has to target — Roger Lewis, Tavarres King and Travis Rudolph — are undrafted or fringe NFL players, overmatched when running routes on top-tier cornerbacks.

“Everybody has their part in it,” Manning said. “Everybody kinda at different times is contributing to our lack of success.”

They are all in this together, sadly.

More dreck and assorted indignities from loss No. 9 for the Giants:

– This was regular-season loss No. 100 for Eli Manning, who started his 210th consecutive game and has compiled a win-loss record that would not be worthy of anything close to Hall of Fame consideration if he was a major league starting pitcher. Manning is 110-100 and there is little doubt he has lost something off his fastball. He is not a junk-baller just yet, but at 36 years old and struggling through his 14th NFL season, it is crystal clear he needs far more help to accomplish close to what he once was able to produce in a game and a season. Did he look shot against the Redskins? No. Did he look confident and have that gunslinger mentality that he could stand and deliver despite hints of disorder around him? No. The front office did him a great disservice by saddling him with this offensive line and now, ravaged by injuries up front and at receiver, Manning is unable to throw his way out of this mess.

– This is what you get with Janoris Jenkins. He can wreck a game and turn defense into points better than almost anyone in the NFL. His 53-yard Pick Six off a deflected Kirk Cousins pass was the seventh career interception return for a touchdown for Jackrabbit. He has nine career touchdowns, also carrying the ball into the end zone on a fumble recovery and a blocked field goal. The Giants have two defensive touchdowns this season, both by Jenkins. He is a special talent and a gifted cover cornerback. He gives you his physical gifts but not much else. Last year, he won the scene, he was engaged as part of a dominant defense and winning team. This season, his attitude has regressed as the losing has invaded and taken over. He can run with the best of them and until he loses a step, he is worth keeping around. Once his speed or quickness starts to decline, he will be of no real use to the Giants and it will be time for him to go.

– As the losses pile up, injuries mount at an alarming rate, a typical and predictable marriage of convenience. Three players were forced out of the game. None are stars or even starters, but their absences will further erode the depth on the roster and put players without NFL pedigree or talent in uniform and on the field. Cornerback Donte Deayon’s first NFL season is finished, as he fractured a forearm and injured his jaw. Two more linebackers are hurt, Curtis Grant with what looks like a significant knee issue and Dontae Skinner with a strained hamstring that could end his season. Get ready for practice squad signings and the arrival of players who were unemployed at this time last week.

– One week after he made a strong NFL starting debut in a victory over the Chiefs — keeping dangerous pass-rusher Justin Houston away from Manning — Chad Wheeler was given a rude introduction to life on the road for an NFL offensive tackle. He gave up two sacks to Ryan Kerrigan, a tough customer who never takes a play off. “He was the better man tonight,’’ Wheeler said. As his right tackle continued to struggle, Manning in the huddle was supportive, but also firm in demanding more, and better. “Eli said ‘Let’s go, next play, pick it up,’’’ Wheeler said. Asked what he learned from the rough outing, Wheeler said, “What I learned from today, my first step, I have to trust my set and stay square.’’ That is all about poise and confidence. Undrafted out of USC, Wheeler likely will be given another chance to start, at least until Justin Pugh recovers from his back issues. When Pugh is healthy, perhaps he returns to guard and Wheeler gets to stay at right tackle. There is no better way to find out about him than to let him play down the stretch of this dismal season.