Which section does this fall under

So this is the story of what happened

So I just got done in a game was playing Leona support my adc was corki, At around lvl 6 Corki goes to mid trying to kill Kled at 50% health and dies and messes up Ori lane. I tell him why are you mid you should be farming at bot, his response was stfu if you keep talking im gonna int so I then tell the enemy team can you report him which they say nah he playing just fine and then everybody starts putting the blame on me trying to report me.

What report does that fall under if someone promotes someone to keep doing it