How to work with a team with no map awareness?

Backdoors despite pings by myself and others, infrequent warding ect. Not exactly sure how to win (especially a close game), when your team insists on charging into the enemy base while you (ex. Yasuo) defend with your support against three open inhibs (because in bronze people only push mid for some damn reason) ignoring 2 lanes of superminions charging in to destroy our last tower. Despite danger pings, proceed to die trying to harrass the cc heavy/mobile enemy team quite literally 4 turrets away from the rest of their team. Death timer is 70 seconds at this point.