Don't quit because the game is "snowballed"

comebacks are 100% a thing and all sorts of different teams are gonna hit their power spike at different times.

if the enemy team is and you have then maybe if you just tough it out for another 7 minutes you'll see a teamfight might work in your favor.

that being said, extreme cases like a 17/0 by the 10 minute mark are obviously gonna snowball the game too far. or if your wont stop trying to solo baron at lvl 5 it ain't gonna happen. and the champs are just an example don't take em to heart