Team balance scaling

After making it as far as I've ever made it in b4 a week ago since I suck, all hell breaks lose the next game. I looked them up and I got a premade team ant their rank was a jack of all trades. They had low silvers high bronzes, and low bronzes. I was in a full low bronze premade. I don't play too many prades since I'm mostly solo queue but my emblem says duo for some reason but these guys that we fought were all premade. I looked them up. We absolutely got destroyed. They had 2 silvers, a bronze 4 a bronze 1 and I think a bronze 5. We got steamrolled. Average ranked would be about b2 and I'm only 60 lp in to b4. That's a huge difference in mechanics. Riot needs to take this into account with flex que.