Please stop matching me with premades (Daily DQ hate post)

Boosted trio in plat 4/5 game. One of them went 1/12/7. No one communicated, and despite my attempts to get the team to group up for a fight (which we would've won, given our insane aoe wombo), literally no one listened. Our support and mid laner (both members of the premade) would be consistently caught out farming alone, and the top laner (the 3rd member of the premade) simply never grouped up. Worst part was that this last player was kennen, meaning that in probably 75% of our fights, we lacked the largest source of aoe damage on the team.

I seriously do not understand this shit. Obviously the trio was in voice chat with each other, because they literally never used chat. Not once. And as a result, our team had 0 coordination. This was a game that we should have won easily in late game teamfights, but instead of playing for the fight, this trio just went off on their own and disregarded the two solo players. This needs to stop. And not just in diamond and above, but at all levels of ranked play.