matched with toxic players

i have never been banned or punished for toxic behavoir and i always keep a positive atitude in game so why is it that i constantly get matched with toxic players. im at gold 5 and 4 games in a row there was fighting in champ select and when i try to settle things dowm people turn on me. out of those 4 games only one yi fed but it is still a pain to have argument back and forth every game. these types of things make me more toxic as well and for the first time i flamed back. how can this be fixed... im really starting to hate this game