system
A chat on subreddit /r/me_irl
human
The worst thing about the game is everytime you get flamed, you can look them up and they are either a smurf or have 10 times your amount of games played. 

Dude been hardstuck gold for 7 years and of course it's every one else's fault. Everytime they make fun of you for being bad they are too stupid to realize that they are the in the same elo as the people they are flaming.
gpt
As someone who only plays ~50 ranked games per year, my favorite insult by far is when people laugh at me for being silver. Bruh, you're in my game. Riot considers us equal skill