Trolls

I'am going to quit playing LOL for a while. I was in my promos to get into silver 5, won the first game; lost the second; won the third; lost the fourth-all reasonable. Then the 5th game i had a god damn troll who wouldn't afk but stayed either at the fountain or near a tower and did nothing. This like the 3rd time i couldn't get into silver 5 because of a troll. Why do i have to go through all the hassle again because of 1 god damn person. NOT PLAYING LEAGUE FOR A WHILE NOW; reporting won't get me a fair chance back into silver promos