New Betray System

If anyone can explain to me how the betray/boot system works I would greatly appreciate it. I feel like this is giving my account a bad rap or something. Was just in a game and I threw a sticky grenade, teamate happened to walk right in front of me and I betrayed him. This was at the 25 second mark of the start of a Dominion game and from what my friends said, they lost hard because of it. I have also betrayed many people on accident with vehicles by lightly tapping them and they immediately boot me without question.
Thank you if you answer

I agree, I was running from a ghost in a ghost and a teammate spawned right in front of me could not stop at all and plowed him got booted. Not like I did it on purpose

Yea I have done that to many times to count. I understand if i do it maybe three times in one game but the first time and then I lose everything for the game I’m in? Bit ridiculous.