Multiplayer Ban

I was banned for 4 hours because one dude on my fire team decided to shoot us and run in front of us and our grenades then boot us. I just don’t understand why i get banned if he was the one that was purposefully trying to kill himself.If multiplayer is going to be like this I’m just not gonna play halo anymore

i had a ban of 7 minutes earlier for a teammate walking in front of my shots and booting me in a game of breakout. i thought 7 minutes was stupid but worth it to keep constant team killers out of play, but 4 hours sounds way too harsh.