ranking

can someone please tell me how to get out of bronze. no matter how hard i try and carry it seems like the same thing happen over and over again. no one ever uses wards. people always run off by them self. no one knows how to take objectives. it seem like team fights start at 15 minutes so then there is just 30 minutes of straight fighting. its just aggravating watching you teammates chase a low enemy just to die and do it again and again and again and then gets mad when someone tries to tell them to stop chasing. seems like people that should be getting into silver is just by luck and no skill at all. i have been in my promos for silver 9 times this year and have not yet be able to achieve it because of how bad this division is. ( and im not saying im the best player in the world, i know i mess up often )