The Reason You Dont Rank Up From Each Elo:
I have over 9 different accounts almost all in plat 3+, and 2 in diamond 3 & 5. These are the mistakes I have found from each elo going from unranked to plat-Diamond. Improving what I listed might help you rank up.
Bronze: In bronze the main problem is farming. People get about 4-5 cs a minute. Its not about warding, beens junglers rarely gank in bronze. Its sololy about your farm. To rank up from bronze, stop trying to harass the enemy laner and instead focus on farming. Once you hit about the 15 minute mark, then you can start to play aggro, take your tower. Dont group with your team unless youre a support, you mainly want to focus on splitting to get towers and farm.
-Farm 6+/m -Split
Silver: In Silver things get a little different. The enemy jungler most likely will gank a bit more often, so youre going to need to ward like crazy. If youre top and the enemy jungler starts bot side, ward river at 2:30. If enemy jungler starts top side, ward at 2:10. Do the same thing as Bronze where you farm and push lane.
-Farm 6+/m -Split -Ward @2:10/2:30
Gold: In Gold it will be the hardest or easiest for you to get out of depending on how good you are. The main problem with this elo is everyone is decent at farming, they get about 6+ cs per minute. The main thing you want to do in Gold is Roam. Farm in lane for about 7-10 minutes then start roaming. Yes that means you too supports. ADCs are the only ones who dont need to roam, they need to win lane, farm, and win game. Keep your farm at about 6+/m and roam is all you need to get out of Gold. You still want to avoid grouping, Gold players have a habit to run away from team fights. 2 people will go in and the other 3 will sit back not knowing what to do, and then just ends up throwing the game.
-Farm 6+/m -Ward @2:10/2:30 -Roam @ 7-10 minutes
Platinum: Plat is where you want to start dodging games if you want to rank up. If your bot lane and support is autofilled, you will need to dodge. Dodge if you get a Master Yi jungler, or Lee Sin jungler. Most Master Yi players either end up feeding, or getting fed to the point they just split push and 1v5 all game, costing the game. Lee Sin just requires too much skill, you rarely find good Lee Sins. You dont have to dodge with Lee Sins on your team if you're good enough. But keep away from Master Yi being on your team. Dodge if youre a 1 trick pony and your champion got banned or youre facing a hard matchup. Otherwise in-game, youre going to want to improve your farm to 8+/m and still roam. At this point team fights start getting a lot better, and you will be able to team fight as a team much easier, if your team has an advantage, group up and use it.
-Dodge Games -Farm 8+/m -Ward @2:10/2:30 -Roam @8-10 minutes -Group
Diamond: Diamond is mainly about whats meta. Luckily for me I 1 tricked a champion (jayce) that is strong in this meta. Youre still going to want to apply everything from Platinum into Diamond, but this time youre going to want to spend less time roaming and more time farming/winning lane. Most Diamond players know when a roam is about to happen due to being very good at warding, and having amazing map awareness. You will want about 10+ cs a minute, and get your tower at around 15-20 minute mark. Once you get your tower, you will want to shove lane and roam to another lane to take their tower.
-Ward, buy lots of control wards. -Dodge Games -Farm Hard 10cs+/m -Don't Roam Too Much -Take Objectives -Take Towers -Group
Masters: To Be Announced
Challenger: GitGud (Korean Advice)