Ridiculous poses and expressions.
Filter.
Bad costume design. This is meant to be set in the late 60s/early 70s but Brie Larson is wearing a costume straight out of Indiana Jones and the 1930s (I guess deliberately intended to evoke those movies). Photojournalists in the Vietnam War all wore flares: http://www.dailymail.co.uk/news/article-2154400/Napalm-Girl-photographer-Nick-Ut-releases-work-Vietnam-war.html