The Simplest Way to Improve in Low ELO
This is common sense, but I just wanted to back it up with some evidence. I was searching through some pro games and there is a huge difference between their gameplay and yours that will help you win more games in low elo. Even when a pro team gets stomped in a 23 minute game there is usually never a player with more than five deaths on their team. If there is, that person was feeding. From looking through pro games I found that a reasonable number of deaths in an average game (around 35 minutes) is three to four, with five showing up every once in a while.
In low elo there are often players that have five deaths at 10 or 15 minutes. Dying more than six times in a game is feeding. Please, keep this in mind so that you play safer and stop dying so much.
Also, wards are super awesome too. Good players buy lots of them!
and just getting so good at that champion through repetition that you can carry, just off experience alone, not because the champion is/isn't op.