What am i doing wrong

Hi. I'm IuStrenght, a mid bronze player currently(didn't played that much ranked). My all time high is Silver 4 in season 6 on another account. I'm an {{champion:90}} main, i take {{summoner:4}} {{summoner:6}} pretty much all the time and i take spellbook as my keystone. And i also play {{champion:37}} when i play duo or i get autofilled. When i'm playing mid i usually win my lane, deal the most damage, have the most gold etc. I usually have the biggest vision score in the game, higher than the support(well i'm in bronze so it's to be expected) but i still manage to lose most of the time. Sure, i have a positive winrate, but when i started i had a 75 percent winrate, now it's only 61 Please see the images bellow: [Damage](https://i.imgur.com/XehguMU.png) [Vision Score](https://i.imgur.com/lbe59mP.png) Here is my op.gg profile [click](http://eune.op.gg/summoner/userName=iustrenght) So i'm here to ask, what am i doing wrong? I don't play difficult champs, i have decent farm (6.7 per minute) compared to other bronze players, i have positive kda, i don't really tilt and i never flame, in fact in most games i just mute all. Can somebody tell me what am i doing wrong and maybe give me some tips to climb :) Thanks in advance and have a nice day {{sticker:slayer-pantheon-thumbs}}
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