You have the very mistaken impression that premades are automatically strong. I've faced premades with randoms and come out on top. Maybe it was a mistake on their part, or maybe it was coordinating and leading my team well, fact remains, it's all about who plays better. A full premade of people who don't play their jobs well or make critical mistakes frequently won't beat someone who knows what they're doing, and that person is capable of that with or without a premade of their own. EVERYONE is. Sure, we make premades to try and bolster our strengths against the enemy, but again, 1 guy who knows what he's doing can survive 2 or 3 who don't. Even in this new system.