Ranked system sucks.
Just went on a big run of wins yesterday. Had all component teams, all smart players, besides a person or two who had a bad game but still was smart enough to not throw and be useful. One single game had an atrocious player top and a bad not me and j ungle yi had to carry.
The enemy teams in most those games were terrible. Had enemies with afk's twice. One enemy with a feeder who built all dorans.
And I've BEEN on the other side before. In bronze especially, it is more about luck with teammates then skill.
Sure if you belong in diamond, plat, you are so good you can reliably carry, but what if you belong in silver, or gold? If you get saffled with these kinds of teams there is little you can do.
I felt bad for the enemy teams because I know what the good players on their teams were going through, and will again get teams like that.
Ranking has no account for personal skill, and doesn't have any way to match you up with appropriately skilled teammates.
Even being on the winning side I can see the flaws with this system.