From what I noticed that all the toxics players I know (i m toxic too) are not like this in real life or on voice chat and also in other games like fortnite they dont flame or something like that even if they did the others dosnt feel as bad as the text chat flame . i think its better for league to open the voice chat for everyone or at least ask players about it or test it in a week,
that will make players communicate better because pings are not enought,
also they can learn English better.
add voice chat to everyone then i will call it a team game.