I am absolutely fed up with this, fed up, 100%

Look at the linked picture, Im not complaining about the Golds mixed with Platinums, because who am I to judge? A couple of them could be smurfing or actually really good with a high MMR and making it to where they should be in the league system. With that being said, none of the above is the case, on my team, the Jarvan and the Lulu were a duo, a Platinum 4, and a Gold 5. Guess who the Gold 5 went against? The Platinum 3 Gangplank, and yes, it cost us the game, because he had no idea what to do against him in macro play or mechanic wise in exchanges. I just don't understand why Platinum players are allowed to Que with Gold players, If I get matched up with a Gold player because of MMR reasons, thats fine, but if I get matched up with a trash can Gold that wants to play with his Platinum friend, and it costs me the game, I'm going to have a problem with it.

1 simple solution

Make Platinum the cut off point so that you can't duo or pre made with a gold as plat and so Plats only play with Plats UNLESS, the other players MMR are of sorts that they are warranted to be in that game and can be match made into the game from Queing solo