Riot designed the matchmaking system this way to sell skins/merchandise not for quality
We get it... you designed the ranked matchmaking system to throw trolls and low-win-rate extremely toxic players into games with normal players to sabotage and draw-out their ranking-up experience in-order to expose everyone to your merchandise for longer periods of time. Hopping to get that sale. Well done. You've managed to ruin a competitive strategy based game and turn it into trash. Cant wait till more and more people catch on to this scam.
Too bad it takes a couple years to truly discover this... and by then you've wasted so much time and money here.... ofcourse this is only in bronze, silver, and gold (the majority of the player base) so there's some illusion it's all whinny new players and a steep learning curve. Very clever... multilayered scam.