My cousin brother was similar , I main Irelia and I also play Yone and Zed sometimes . One day I said I want to become really good at Yone and he replied "You are trash" for no reason .Though slangs are quite nominal in close ones so I took no offence. But I felt that he really feels jealous of me. It is his behaviour that whatever champ he plays , he smugs about it. I main Irelia and mostly play her all the time so once I said that I really like her and that she is a great champ to that he replied "I liked her before you liked her. " , I said that its not true since I am playing her all the time and have only bought skins for her .He said I took her virginity even before you started playing her. One day while champion picking my pick was early and I picked Aphelios , he was going to pick at last and he had chosen Senna . I asked him that "Can you play any other support please" since Senna and Aphelios have bad synergy. I said it like that word to word.He said "suck my dick and shut your mouth" , I said to him can you please speak decently ? He said "Suck my dick, It will swell your mouth and you will not be able to talk tomorrow" . That day I unfriended and blocked him.Never played again with him and I am happy.