You really want to know what's terrifying? Teammates in Gauntlet mode.
You want a nice game where you can learn how to play the Doom Bots mode better without much resistance, everyone agrees in the chat to go level 1 or so. Right when you get into it, everyone goes for various high levels like 63, 80, sometimes even 100, and you're stuck going against the worst odds ever because Teemo's doing everything to kill you and the bots are practically gods with Fog of War removed. Meanwhile your teammates -- the same ones who voted for the high levels -- end up dying a few times, they get mad and start feeding down mid lane, and when they see you with barely any deaths at all compared to their something like 0/15, they threaten to report you because you're "not assisting them" or you're "leaving them to die".
Even in Bots, you can't get away from trolls :(