why you cant rank up

most likely toxic instead of giving yourself fault (raging at your jungler or blaming((sometimes it is them but focus on yourself one of the biggest tips)) you dont farm very well , you expect your team to work like ranked 5's (rely on team too much play champs you need ganks to win with , your greedy for kills instead of the true focus objectives and farm (12 cs=1 kill) , you dont position well, you cant play from behind and know what to do to get back in the game (ganks isnt the answer ), you dont take small advantages and snowball them, you dont use vision or use it properly, tunnel visioning instead of focusing a priority target or chasing that target too deep, you dont have good map awareness, you dont spreading your lead into other lanes. Do all that and you will start ranking up extremely quickly