Riot was not lying about players with a positive attitude wins more games!
I just had an amazing gameplay experience. During champion select I was not playing attention and I picked Rengar mid because I thought I was jungle. My team tried to warn me about it but I wasn't playing attention at all. During the game not a single person was toxic about me picking Rengar mid. Even though I fed a Fizz about 5 kills until the laning phase was over, the only thing that came from my team mates was encouragement. Later during team fights I picked up a few kills by cleaning up fights and started snowballing. We were looking to win the game by sieging their mid tower. I then made a mistake by being caught and made my team lose a team fight and an inhibitor. Still, not a single person said anything mean to me. Soon, the next fight came up and I was able to assassinate the enemy adc with my teams help and then we ended up winning the game.
I did not play well this game at all, but even so I still had so much fun and this was probably one of the games I enjoyed the most.