Ranked ladder bullshit

The fact that lp only matters if you win is the worst idea. You can be the only good one on your team for 10 games in a row go 20/0/50 and if you lose you lose lp. This system is the worst. All someone has to do is get lucky for their first 10 games. There are so many good players stuck in bronze and silver and there are so many horrible players and trolls in gold and high silver. I've never been higher than gold 3 but even then there was still people who belong in bronze. Why can't they make it so it goes but your kill death ratio and objectives taken or assisted in and minions killed. This would not work for support but if supports had their own summoner spell like smite there could be another system for supports. Why are we still playing with such a stupid system. You should still lose lp of you lose but you should lose less for doing good and gain more for doing good. Why should your team be able to hold good players back or carry noobs.