Well the fact that you are in bronze 5 means two things.
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Your teammates are not going to be good.
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You should be able to carry hard enough to win games regardless of teammates skills more times than not. That is why only a handful of the ranked population is in bronze 5. You think your the only one who has bad teammates and that's the only reason you cant rank up?
To rank up: You are going to have to accept the fact you have a lot of learning to do. You have to focus on you and only you as to what you could have done to help win a game when you lose and why you win when you win. Figure out what lanes you are good at and like, get a couple champs, lookup some guides.
Play to win, play to improve. Acknowledgethat low elo is a lot different than challenger and the streams you watch. Its Team death match time. Get in there, get some kills, push objectives, ignore assholes, and try to do whatever you can to win. Your fed and your still losing? Stop getting caught in late game situations? There are a lot of reasons you are losing besides getting bad teammates I'll tell you right now. I have not looked at your stats or watched any replays, but I can guarantee that.
I suck at this game and I could jump into bronze 5 and carry myself back to silver in a fairy short period of time. Bad teammates and all.
Hope this helps. Just trying to be honest.