Do you pick a tribe to go for without even looking if your teammate’s hero power will lock them into one?
Do you try to micromanage your teammate, and send angry emojis and stop trading if they don’t follow what you say?
Do you never offer to portal, even when you’ll see it would be a triple?
Do you clog up a teammates hand at the last second when they need it for things like earning bloodgems? Or perhaps pass through a third to make a triple right before the clock runs out so there’s no time to place it?
If so, when you find that your teammate has conceded, it’s likely because it was better to take the penalty than continue playing with you.
If you get a lot of teammates conceding, practice self awareness and think that you are the common point.