The one thing I absolutely can't stand
When you go into a normal game (especially with friends) and you STILL shit talk the enemies AND your teammates. I don't understand this. People practice in normals or go a normal if they're too tired to play a ranked game, and you want to be toxic to them? You want to be toxic to people that you KNEW were only playing for fun while you were also practising?
Riot if you ever decide to have a voice chat please test it out and take surveys first before you make it permanent. I was in a game with people in Discord and they were acting as if it was ranked and starting to be toxic towards me and one another. I use to be for voice chat but I left that call before the minions spawned so I didn't have to listen to the toxicity.