Stop letting people play champions they just bought in ranked!!!!!

Ok so i have posted this a long time ago, so i am bridging it up again, people play a ranked game, they get their ass kicked by a yasuo for example, they immediately go buy yasuo because they think he is op. The jump into ranked games right away and the result is that they end up feeding. They lose to a syndra for example so they will go buy syndra thinking that she is op and they will end up feeding again. The problem is that 8 people or way more had to have a feeder in their team who ruined their game.

What i suggest is that riot forces people to play a certain amount of normal games with a champion before they can use that champion in a rabked game. The amount of games i don't know maybe 5 maybe 10 but the thing is people can't just do that.

This will reduce the amount of feeding by alot i think and improve the game. I know that NOONE can master a champion in 5-10 games, but it enough to get a good feeling on that champion. For example i bought elise because everyone in the world series was playing elise, i jumped in a ranked game and i dot destroyed, sje was so hard to play, i feel guilty for doing that, of had played a couple normals with her i wpuld have known that she isn't my style and i wouldn't have played her again. Same experience i had with other champions. I know lots of people will say thia is unfair for them but hey isn't it more unfair when you play a champion that yoi just bought in ranked, and feed and ruin the game for 4 more people????