Selfish gameplay is most likely the reason you are stuck. You probably do not want to hear it, and you mite even yell at your monitor in rage, but it is true. In a game where everyone is trading and looking to win every 1v1 without a moment...

Are you in iron/bronze and think that getting ranked Gold is an absolute impossibility? I was there. My friends were ranked so much higher that I couldn't play with them. And I decided to cast aside all the patterns and habits from decades...