Thank you for all your responses. Went on winstreak, but lost the same amount of games that I've won lol. Please enlighten me on how to hard carry games.

http://matchhistory.euw.leagueoflegends.com/en/#match-history/EUW1/39800926

My own point of view on my recent losses ( if you are not interested just ignore this post)

Loss 1) played vayne. was fine bot early, graves/leo were not that good. Alistar pretty bad, wukong/brand both bitching and raging at each other. Lux/seju carried that game. Could i win this game? Yes. If i got fed/more farm I should have been able to carry that game. I blame that game on myself.

Loss 2) Played caitlyn. Early was fine, I saw that lucy was smurfing and added him afterwards (he was plat 2). Annie got ridiculously fed, lucian carried super lategame due to him being able to farm freely / better adc mechanics. Again, could I carry if I didnt die so much/was better/was allowed to farm more? Yes, I blame myself for that game.

Loss 3) Played vayne. Here is where the fun part begins. decent/farmed early/midgame. Found out reng/zed pretty fed. I was basically the only threat so they used everything on me, obviously. Had no real clue to deal with them and I died too much. I should blame myself for the loss here, 13 deaths not acceptable.

Loss 4) Played ezreal. This game tilted me pretty hard I am not gonna lie. Coulden't handle fed yasuo/darius/gragas. No clue here on how I should've won that game.

Loss 5) Played Vayne. Only mid was left and I only play adc's on this account. When I have to mid I normally play ezreal mid (since other adc's aren't that great), but since I felt like we lacked CC and I am pretty comfortable with vayne I decided to pick her. Thresh/varus accused me of trolling which I understand. I ended up 8/3 midgame, but had to face pretty fed kata/rengar. Bot+jungl where feeding and heca did okay. I managed to stall the game out, even got a pentakill. Wasn't enough tho. No clue here on what I should've done. (other then maybe not pick an adc mid all the time but honestly, I want to improve as adc and in low elo games are not at all decided on the champions people pick.)

So yeah anyway a long post, if you read it thank you for your time. I feel pretty clueless on what to do so yeah, maybe someone else can help me out here.