DISCLAIMER: THIS CAN GET YOU BANNED IF YOU USE IT IN A OFFICIAL BLIZZARD SERVER!
This is a very simple glitch that will require help from the other team, but it’s still viable.
Note, you can get your friend on the other team if he/she tries to join your on going quick play match. There is a 50 percent chance they will get on the other team if someone leaves.
Roots by Tobu: https://www.youtube.com/watch?v=H7NuU-dDRLU&ab_channel=Tobu