Toxicity just because of this game

Well a few days ago i played with my friends and one of them was so toxic to me,I understand that people are getting tilt some times but I just stole blue buff and he went AFK, he said that call me back when you are playing without (me) (he said that to my other friends). he was a friendly person and because of this game he became so toxic, even other people in Eune there so much toxicity there. I was versus Irelia and she started to say bad things about my family, I don't get it why people are so mad just because of the game or if someone kills you?. Sometimes im mad or tilted because im losing but im not that toxic that i will swear players, flames also happens like when I get flames as jungle. Last season i was Silver II right now im stuck in bronze elo trying to get out of there. I have a friend that he is diamond and he played since the game came out and people were better nice then today, How can we fix the toxicity or any ideas how to deal with people like that and also im feeling this game is effective on some of the players psychology bad that they are addicted to this game for example like me, is this want the company wants to? to the community be toxic ? well I m only bronze player maybe im just saying bullshit. i would love to hear your oppinios