I dont think "leaving the army" itself is an insult. What if he didn't think it was his calling. Just coz its a profession associated with this "ruthba" and the whole aspect of being about shaan and all doesn't mean someone should do it unwillingly. As long as he is doing something with full imaandaari n he/she is sincere, it doesn't matter. In the long run, a doctor, carpenter, plumber, soldier, actor, dancer all gave their role n their place in nation building.
They never did get into why Samrat left the army n i am sure they won't. They didnt think it through. Their side characters have no character arc or depth whatsoever