Well .. we are in the trope terrytory of ... ex military inept for the common world clichee ... quite a wide spread that has all over media and film and series about inability to adapt to life back at home ... MC is right in there.
this game establishes the fact MC is socially dumb and his pal
who is in the park mingling with other people,
while MC is locked up in his home hiding from other people,
it just speaks volumes about other soldiers getting confy,
while MC is still struggling to land a decent life style back home.
Notice that it is the very first scene esteblishing MC troubles..
MC kept piling on the overseas missions and his family was breaking apart at the very seams .. another clichee about soldiers.