system
Given the following post, respond as if you're commenting on Reddit:
human
[HALO] Why doesn't John 117 hate the UNSC?

I understand that SPARTAN III soldiers were recruited from orphaned children who hated the Covenant but SPARTAN II were originally supposed to fight human rebels. John 117 was the best and most loyal of them but how come he didn't hate UNSC for making him a Spartan? He was stolen from his parents as a child and cast into a harsh world of a military discipline, replaced by a weak clone who died afterwards making his own family think he was dead. If I were him, I'd do all I could to escape the program and try to rejoin my parents or at least, let them know I am alive.
gpt
He have been indoctrinated to serve the UNSC since the day he arrived on Reach. The Spartan training program made damn sure the kids were busy and never got the chance to think about stuff like that until they were indoctrinated enough for it not to matter.

His fellow Spartans are the only family John got now. He and the other Spartan IIs considers Halsey their mother more than their forgotten biological parents. And the only purpose he got are to keep fighting on behalf of the UNSC.  

Some recruits did try to escape the program. Some even succeeded. Some rebelled later, too. John simply was not one of them.