Just how pathetic can the league community be ?

Usally when i play ranked i try to avoid talking non sense things and focus on the in game and if i talk i only say mia ss or saying if ennemy f or warded , cheering up teamates on the last rankeds i played i had a jax who started ruinning our game ( which we were going to win ) , because jhin stole the red buff from him ! Then he afkd in fountain spamming his badge and other emotes and randomly insulting us kids and trash players the problem no one in the team was actually flamming before he started they were all nice and communicating with pings then jhin told him '' sorry bro i need red buff more than you do i am more fed so i do more dmg with red buff '' and the jax was 1/4 , and then he said he was 23 years old , man i am 18 yo and i do shit like that if he was really a 23 years guy than this is a shame and disgrace to all people on his age , some people at around 23 years old became famous by doing something in their lives , and here you are a 23 yo old dude who trolls in online games and insults innocent people behind screen ( tho i didn't really beleive he was 23 yo old but who knows maybe he wasn't lying after all. ) I was trying to make him comeback to playing , cheering him up but nah all he was replying the same sentences over and over again and said we're troll team who don't deserve to win , yeah we don't deserve to win because jhin took the red and it's true that he needs it more because he was more fed than you ? Thank god yesterday i got report feedback message seems like when i looked up in his match history he most likely did the same thing before. EDIT : For those guys telling me to mute toxic players , muting wouldn't have stopped him from trolling.. Stop ruinning the game for the other 4 guys because of a stupid reason , it makes you look pathetic and the scum of the community really.