What if I say rank != skill?
You don't know for certain who you're up against.
When I started playing ranked I was placed in bronze 2, by the end of the season I was Plat 2.
About a year ago I played on a smurf, probably around level 7 and I had a team full of absolute newbies, i didn't want to ruin their game so I kept a low profile, right untill an opposing Yi scored a tripple/quadra on the steps to our base and became exceedingly rude, started bragging about being a gold smurf, and that we were all noobs.
I decided to clean clean up his act, so I killed him and most of his team.
Rather than chasing the rest I pushed towers, turned the match around, singlehandedly won the next teamfight and finished the game.
All I wanted was a clean match, and I were happy just laying low, so don't judge players by their rank or level, play the game, have fun and improve.
Without a decent champ pool and full runes/masteries it doesn't matter who win or lose as long as you have fun.