its funny because I know where your coming from. Its weird, I have never been a player to tell someone to kill themselves, but I have always talked shit to teammates or enemies since I started. I have been playing since season 1 and noticed around season 3 and 4 my shit talking was the worst. I had played so many games that I guess I felt like I was good at the game. It took some soul searching but around this time last year I finally realized I am shit at this game. It didn't matter that I had played probably 3000 games, I was shit. I really wanted to reach gold so one day I just stopped. I stopped focusing on my teammates and focused on myself. If my teammates started flaming I muted them. I got a little better at the game, chilled out, and reached my goal rank.
After season 6 started I was really focused on this season. I kept with my philosophy of not saying much and just encouraging teammates since it seem to work so well at the end of season 5. I again reached my goal rank of gold this season, but did it back at the start of April so really early in the season. I have since been playing with friends and ranked 2 other accounts to gold for whatever reason. I considered myself a pretty chill player until this weekend. For whatever reason I just lost it. I have been playing ranked with friends a lot recently and it started to weight on me. Although gold is not a great rank I feel I learned a lot in my climb. However, my friends are still learning some of these things and don't always see what I see. They also play the blame game a lot and talk a lot of shit to the enemy and teammates. I started participating in this behavior again this weekend and it got to me. I had to log off, I was just not having fun. I was raging at players when I knew I shouldn't. My friends were upsetting me with their shit attitude. I just couldn't take it anymore. I still am turned off from the game a bit and planing to take a break. I think its important to step back and look at the big picture.
In the end league is a game and that's all it has. It has been a huge part of my life, but its not fun when I get upset about it. So I would say just be honest with yourself and realize you don't want to play mad. Calm down and forget the little mistakes. Focus on yourself and if people flaming just mute them. If your in a bad mood stop playing and take a break. Its just not worth playing this game when your mad, it only makes you more upset and is no fun at all.