It's literally making the game more toxic, players know now that they'll be penalized even for mildly talking in the chat apparently if too much of it is directed at one player, yet if they int the whole game they'll get literally no punishment whatsoever while anybody who got rage baited in chat gets penalized immediately. That's the chain of events that happens in most matches now, especially when leveling. Well done, Riot.
Imagine being so bad at conceptualizing a system to reduce toxicity that you end up ramping it up and giving even more impact to the toxic trolls that have always plagued this game. Get your priorities straight, Riot.