League of Legends ranked system just blows

Hi, i'm an avarage silver 4 player, not concidering myself as a pro or sth, but i quite want to get out of this devision! So i try to play champs that can snowball once they get fed. Ok sure, sure everything ok for now, you are winning you lane. And then you see it....that botlane have already died 5 times, and is flaming our jungle who by himself have died another 3 times....Teamfights begin, and enemyteam focus you as ****, and you can basically do nothing against them, science your team is only flaming and is total 0. You ask yourself...mhm Where was i wrong, i did everything right on my lane -_-, isnt my hard work on the lane gonna pay you ask? Nope, fuck you other failed your game and you must suffer too :))))))))), becausee........reasons(riot). This is pointless. IS RANKED IN LOW ELO LOTARY??????? Are you gonna get feeders team or not....Idk about you but doing everything right and finally getting nothing doesnt seems fair, does it :/? I am done with this game anyways, wish luck to all of you.