My reason why I think match making is dumb dumb

Let's look at my ranked games. In my last 10 wins, only 6 teammates out of 40 had a KDA under 2.0. Only 1 of which had a KDA under 1.5. In my last 10 loses, only 14/40 teammates had over a 2.0 KDA Only 6 of which went over 3.0.

Problem being, there are very few times when I win with teammates playing poorly, and very few times I lose when teammates play good. It seems like there is never an even balance in the game, either all my teammates crush or they all get crushed. I rarely get a close game, something like top-lose, mid-win, bot-win, jungler gets out jungler. Not sure why, but sure seems that way. I know KDAs aren't the only measure, but they sure tell who feeds and who doesn't.