Ranked system - does it match players of the same level?

I started playing ranked a little while ago, and I feel that the matchmaking system is pretty bad.

Before that I was playing normal, usually with gold+ (diamonds as well). I usually wasn't dragging the team down, and I had decent average KDA (4-6) and winrate (>50%).

I also felt that I understood the core concepts of the game; vision, objectives, when to engage, teamfights priorities, item builds/counter, roaming, champion picks, etc. So... I decided to start playing ranked, maining support and jungle (focusing 1-2 champs on each).

Now, in ranked, I can't seem to pull myself above silver. I have the same KDA & winrate, and yet... The players usually differ from one another a lot in skill, and it's only a matter of who you get in the team dice roll. As support role (even jungler), I feel that it's very hard for me to carry those bad team roll games.

To conclude, I think the rank system is failing to serve its' main purpose; matching players of the same level. I feel that it's a lot better (still not perfect) in normal games.

Thoughts?