How exactly was Jadeja supposed to score at 3 an over whilst also shielding the tail? No one has answered this.
Jadeja could have gotten a single every ball, but doing so would have exposed Siraj and Bumrah. He tried to hit boundaries along the ground but got no value for his shots. Hitting in the air risks dismissal, and for large parts England just bowled good balls at him. So he took singles on the 4th/5th balls (occasionally on the 3rd/6th balls) and backed Bumrah and Siraj to see off the rest of the over.
One over he couldn't get the single on the 5th ball, so the field came up on the 6th ball. He picked up an easy boundary, but then Bumrah had to survive 6 balls next over (which he did).
On numerous occasions he wanted to run two but Bumrah wasn't having it.
It was a stalemate. There's no way Jadeja, with his skillset and in those conditions, is hitting risk free boundaries. England were actually bowling well to their field. At the same time, it was difficult for England to take a wicket. The game was hanging on who made a mistake first. Bumrah eventually gave in and played a bad shot. Siraj was unlucky. But Jadeja survived.
I ask the question again - please explain what exactly he should have done better? What scoring options were available to him that he did not take?
Criticisim needs to be founded on some substance. Right now it's coming off as a hot take just for the sake of it, being put forward by people who only read scorecards to understand a game.
Jaiswal, Nair, Gill could have all done a lot more. They actually batted poorly. If you want to criticise anyone in the Indian batting lineup it's them.