Challenger game lasting 8 minutes, straight pathetic by players and riot

hey y'all, if u go to PANTS GAREN ONLY's profile (currently sitting at rank 4 NA), you'll see that one of his recent ranked games lasted 8 minutes. Now he was on the winning team, so he did fine. The issue is the enemy team, who had 3 qualifying trolls

1. First the Xin zhao, now he gets his red buff stolen lvl 1 by the yasuo support, and decides to afk after the yas ints his lane. Now i do understand his reason to, so i dont really blame him for afking for a few minutes
2. Second is Nunu, who ran out of base with 0 items, had barely any cs, and was lvl 2 by 8 minutes and had a whopping 2 cs.
3. Idk if he was duo with nunu, but yasuo straight trolled right away by stealing xin zhao red buff and flashing into enemy bot lane at like 1:50, also was lvl 3 by 8 minutes and had only his starting items What i'm concerned and disappointed about it how nunu and yasuo decide to troll in a high elo ranked game, griefing two other players on their team who actually tried winning. Now these acts of troll were intentional, as all 5 players left fountain and all players knew it wasnt going to be a remake. What im really disappointed in is the fact that riot didnt do a single thing about these players, i would let the xin slide by the nunu and yasuo were straight trolls and this behavior should get these players banned, no exceptions. I'm very concerned that riot is letting these players continue to play on their accounts. We need to spread awareness on these types of trolls, people who grief the game instead of afking or typing. i would send a clip or ss of some footage, but i dont know how to post things from my computer on to a boards forum.