Afk in promos.

ok so this guy played anivia mid, right? The enemy mid laner was Ahri. Anivia said in the chat that she will go afk because "ahri poked her with Q all the time. no point in playing" (not the exact words, but similar) and then stayed at the base. Then our adc decided to go afk as well. I know I should've reported them, which I did. I know this isn't the first, nor the last time this happens. I just wanted to share this. I lost my promos for Platinum because of this. And I've had another afk in my team in my previous promos as well, which led to a loss, of course. Idk man I mean, I feel as if no matter how hard I try to get to plat, stuff like this will happen.