You explained it so well. Thank you!!I don't think all Marines are lazy because of Shamar. However, I think he should set a better example as a Marine. Surely he couldn't have acted like that while he was in the military or he would have been kicked out or disciplined. Even if he hadn't been a Marine, I would have been repelled by his behavior (not working with his team, not doing anything to help around camp) but the fact that he has training which should make him better at doing those things is particularly galling.
It's like he's not only ostracizing himself from his tribe because he isn't thinking about the ramifications of his behavior and doesn't know any better, but he's actively CHOOSING to antagonize them. I would just expect more from someone who has been in military service.