Sometimes, i get it, people think differently like safelane pudge, support sven or carry willow etc.
For me, my red flags usually are the pre tilted players at the start of the game with phrase like, “You didn’t pick treant/np, we lost the game already.” As if our morale isn’t low already, the players decided to just go jungle, feed or not even supporting our pos 1 and went midas. In around 9/10, to me, that is a red flag.
Tho i am curious what are your red flags at the beginning of the match from your point of view.
Had that happened. Man proceeds with pos 4 death prophet without silence til lvl 11. : ')