I duo'd a few ranked games with my silver friend the other day, and I swear to god those silvers we played with/against played worse than most of the bronze players I've faced. Had a dc and a non-communicating insta-lock Kindred who took flash ignite and fed all game, except for stealing my farm mid game and our top laner's kills. We lost because he was supposed to jg. My support yelled at me all game for not doing anything and having little to no farm, when the enemy bot had us shoved up to turret all game. With no jg lane pressure, we lost bot right away. The first game we played we had a jg Ekko who built damage when we needed him to build tank, and he jumped into every fight possible, and lost. He also never ganked lanes. He'd walk in, and walk out without doing anything.
I was pissed, to say the least. They caused me to lose my last promotional series match ( for bronze II ) and drop to 77 lp. In just two games.