Possible fix to toxicity by means of new SR mode

So, I've become very sick of games with trolls and toxicity. I played LoL for years and quit about 2 years ago because of the community. I recently returned a few days ago. Upon returning, I find myself getting at least one troll or toxic player every game which ruins my experience. I'm very tempted to uninstall again. /mute all doesn't work because after someone trolls, other players still start to flame them which ruins their performance as well.

My idea for a solution would be to make a separate Summoner's Rift game mode where the entire chat is disabled. I enjoy normals more than ranked, so I am thinking about normals play. In normals, it seems to me like the amount of games where teams use chat to work together and coordinate are about 1 in 10, whereas I feel as though I'm getting trolled or flamed the other 9 in 10. Obviously these numbers are probably a bit exaggerated, but you get my point. I'd rather give up chat to have a quiet game where nobody is toxic. Regular Summoner's Rift could still exist, and if it turns out the majority of players choose no-chat, then what's the problem? Also, I feel as though people wouldn't troll as much if they didn't have the "satisfaction" of all the attention afterwards. If someone trolls and everyone is unable to chat, I imagine the troll would lose interest much faster. Pings would still suffice just fine for the average communication.

TL;DR: Please make a separate Summoner's Rift mode where chat is completely disabled. This could be a far more enjoyable experience as you can still play with players who are more challenging than bots, but without the toxic community.