system
Given the following post, respond as if you're commenting on Reddit:
human
[Red Dead Redemption] Once Ross has got his sights on John, is his fate sealed or could he have played things better?

We know Ross and the FBI weren't letting Marston and the Van Der Linde gang off the hook when accolades were on the line, but was John always going to bite the bullet when all other loose ends were cut? Or if John had been (uncharacteristically) polite, brown-nosing and devoted to the government cause, would he have gained any favour with Ross?

Besides fleeing the country, did John have any chance to die an old age as he claimed he wanted to Reyes?
gpt
While it's not impossible to imagine a scenario where Ross lets John live, it's almost a certainty that he was going to kill him. Accolades and public opinion were too important, and Ross wanted his career to end on the highest note possible. If he let John go, he would forever be remembered as the FBI agent who ALMOST brought the entire Van Der Linde gang to justice. They were one of the last symbols of the wild west, and a constant reminder of the justice system's failure to properly police the country. 

Hell, John was already supposed to be dead by a hangman's noose ten years before, but was broken out of prison by the very same gang. So if anything, Ross was going to enact a legal punishment denied to the government by the actions of Arthur and the other gang members.