I recently made a smurf account just to play with someone else who was about level 5, and it seemed like the enemy team had at least 3 people who were on my skill level (I'm level 30 on my main). I know it's difficult, but it certainly is making you better. Just stick in there and don't listen to them.
You also have to realize that Riot would fix this problem if there was a solution, but the only way to do that is to make League of Legends cost money. This is one of the problems that comes with a free game, just try to improve. Like MTDM said, it gets better.