Reported Hell
It is quite obvious, in fact, it couldn't get any more obvious, that the matchmaking system starts giving me extremely toxic teammates immediately after receiving a chat restriction.
It is not uncommon for me to be on a team of all bronze and silver players while the enemy team is plat and diamond. The matchmaking system purposely selects teammates who do not help their allies in order to create more frustration for me, the chat-restricted player. Most games will consist of players who will stand right next to me watching me die in a team fight while they farm their cs. These are the hypocritical players who troll the game hard and then immediately start whining for everyone to gang up and report any retaliation to their trolling.
I believe this is an effort to see if the punished player has reformed or not. It essentially creates an extra toxic game as much as possible for the chat restricted player, an "elo hell" if you will.
Maybe Riot thinks this is a good way to accelerate the "toxic" players out the door. Give them constant back to back games that they cannot possibly resist becoming angry.