New quarterback.

Same old damned Jets.

Joe Flacco was the third quarterback to start for the Jets in their 10 games this season and it made no difference. The Jets lost another game, 24-17 to the Dolphins on Sunday at MetLife Stadium, to drop to 2-8.

The 36-year-old Flacco, who hadn’t started a game since last season and had all of one week of practice as the starter with the Jets, who traded for him on Oct. 25, performed admirably as he completed 24 of 39 passes for 291 yards, two TDs and no INTs.

But that wasn’t good enough, because the Jets aren’t good enough.

They never are, are they?

Even when the Jets tease you with some good plays — and they delivered a number of them from some of their youngsters (most notably rookie receiver Elijah Moore, who caught eight passes for 141 yards and a TD looks like the draft steal he appeared to be in training camp) — they cannot overcome the bad ones they always seem to make.

“Ninety-percent of the games in this league are lost, not won,’’ Jets coach Robert Saleh said. “This one was lost.’’

The Jets cannot overcome the coaching staff burning two timeouts by the 6:19 mark of the third quarter in a close game (spoiler alert: they desperately needed those in the fourth quarter as Miami bled out the clock with the lead).

“That’s coaching,’’ Saleh said. “That is something we have to get fixed.’’

The Jets cannot overcome defensive lineman John Franklin-Myers committing a fourth-quarter roughing the passer penalty on third-and-4 from the 5-yard line as cornerback Bryce Hall made a terrific pass break-up to seemingly keep Miami out of the end zone.

“Unacceptable,’’ Saleh said.

The Dolphins would take that gifted first down and score a TD three plays later to take a 21-14 lead they’d never relinquish.

The Jets cannot overcome their kicker Matt Ammendola missing two field goals.

The Jets cannot overcome rookie cornerback Isaiah Dunn being completely fooled by his eyes while Dolphins receiver Mack Hollins breezed past him down the left sideline for a 65-yard TD catch-and-run that gave Miami a 14-7 lead in the third quarter.

“Poor eye discipline,’’ Saleh said. “I’ll just leave it at that.’’

The Jets cannot overcome four trips into Miami territory that resulted in zero points — a fumble, two missed field goals and a punt. The most egregious of those was Flacco being T-boned from his blind side on second-and-goal from the 5-yard line by Dolphins safety Brandon Jones, who looked like he was supposed to be picked up by running back Tevin Coleman, who was running the other way.

“Protection breakdown,’’ Saleh said. “I won’t say who, but Joe is expecting that one to be accounted for.’’

A third-quarter drive with the Jets trailing 14-7 perfectly encapsulated their day and their current discombobulated state. They burned those two precious timeouts, Flacco was called for intentional grounding on a second-and-4 from the Miami 11-yard line and then Ammendola missed a 40-yard field goal.

“I feel like just as an offense, myself included, as a whole today we did some good things, but we made too many mistakes to win the football game,’’ Flacco said.

With rookie quarterback Zach Wilson expected to return from his right knee sprain for next Sunday’s game in Houston, this looks like a one-and-done for Flacco, who’s 0-7 in his past seven starts dating back to 2019 (0-5 with the Jets).

“Every time I take the field, I want to go out there and I want to play my best and put my team in the best position it can possibly be to win the football game,’’ Flacco said. “Obviously, we didn’t get that done today, but I’m going to continue to do that until I’m told that I’m not going to do that and I’m going to enjoy the hell out of it.’’

The best thing Flacco can do now is counsel Wilson, who’s a willing sponge, eager to get better, to back up his No. 2-overall draft status.

“I laugh, I’ve told a couple of guys as soon as me and [Wilson] get together, he’s like a million questions, [which is] all good,’’ Flacco said. “Being able to talk to him is a lot of fun. I don’t have all the answers.’’

The Jets have been short on answers for too long now. But Wilson’s imminent return after missing the past four games at least resets this Jets season back to what it was meant to be about in the first place, which is developing Wilson.