So I just had an insightful game
The first half of the post laning phase contained:
-everyone criticizing each other -"gg team too heavy" -Yasuo -people running away from the support and into the enemy -blind checking bushes/jungle -flaming
The second half of the post laning phase contained:
-the support and ADC buying pink wards -baron steals -people listening to the shot caller -gentle advice -close teamfights/shut downs using everyone's synergy "nvm this team is full of gods" -the same Yasuo
Despite the huge lead the enemy team had (up to 6.4k team gold), my team managed to pull its shit together by realizing that flaming each other does absolutely shit when it comes to winning, and started listening to each other.
Unfortunately, some people learn too late and some people never learn at all.
Positive attitude matters!