Normal Matching qustion

How the hell am i in a game with Gold to Platinum's? That isn't fair or right. I should never ever i mean ever be in a game with Platinum's. I don't care if its ranked or normal's even if my MMR is high in normal's. It leads to a toxic and unfun environment. All it leads to is me getting pissed or raging. My last game the enemy team had 2 plat's and 3 sliver's my team had me bronze 2 ( i belong there) 3 unranked's and one gold. How can you call that balanced. I am bronze i earned it let me play with other's in the same elo range. I didn't rage i just didn't care about the game and was feeding because wtf else do i do. I can't do anything but run into the enemy team and die over and over again. Don't get me wrong i dont mind losing but when I fell like a one legged man in an ass kicking contest it gets old fast.