Yes,
Riot's ranked play / team or player matching makes ranked play basically pointless. Matching is obviously broken when a team can score double or triple the points of the opposing side.
I have been matched with motivated players and have played fun games, win or lose (both sides close in points). But, far too often am I matched with a player that gives up after a bad play, or a player that thinks 1vs5 is a good idea, someone that afk's, does not try to work with the team etc.
Make a B6 tier, all of the (consistently) reported "grief'ers, feeders, afk'ers will go in B6. And, B6 'does not' get teamed up with the higher tiers (until their reporting improves).
I am giving up on LoL, ill check back in the summer (maybe) to see if things have improved.