I've been playing since end of Season 1, started playing ranked games at season 2. Back then it was elo and not leagues but my progress has been like this
Season 2 ---> Silver ELO
Season 3 ---> Gold 3
Season 4 ---> Platinum 4
Season 5 ---> Platinum 3
I also have 2528 Normal Wins and about 2.2k Normal Losses. Also a lot of ranked games per season, approximately an average of 200 games per season, adding up to 800 ranked games.
Recently, I had a bad game and a teamate told me 2.5k games, pathetic. And it made me think...
What have I been doing so wrong for so long? How can I be this bad? How is it possible for someone to have spent this many hours playing the game and still be just above average performance? (***UPDATE:*** I mean middle tier is Gold and Platinum is right after that, sorry for the totally wrong way of putting it)