FIX YOUR RANKED SYSTEM

I just played a game, im gold 3 and pushing to plat in the next few weeks... i just was in a game, where the Rengar top never connected at beginning of match. at around lvl 9 he connected and went to top lane ( which is fine i understand dc's and think the leveling system is really good at helping dc's ). at this point Thresh our support leaves the game. i lost promos because of 2 afks. Now league, tell me how someone who "flames" another person it's "ruining" a game, WHEN you have a button to stop hearing from that person literally ANY **in time you want to. But when 2 afks ruin my game, i have nothing i can do... I don't get compensated gold, or get to choose through their items as a team. Tell me how its fair, that i lose promos because of disconnects or afks and still get punished for it, without ANY help just a promise that says " we'll ban them " but yet it continues to happen regularly. Get out of here with that b/s, and do something.