Just had a player on my team that hard flamed all game, I put him on mute but my other team mates kept chatting with him. But In the chat after the game he confessed to losing us the game. Apparently we "talked too much". Besides flaming my team and me, he rage quit for a few minutes and came back, but when he came back he just started to int and refusing to help. In our last team fight he just walked around doing nothing while he was near us all the time, straight up trolling.
So my question is: Should players that deliberately make you lose be punished harder?