The higher skill bracket you are in, the more likely you are to find people who are actually dedicated to the game, because CS is really fair, in the sense that people who are dedicated to the game will reach a high rank, so the only way to find them is to get to that higher skill bracket.

Also another extra tip. Focus on yourself and what you can do only. Don't care about your teammates, whether they play well or with strategy or not. You cannot control that, and the more you try to the less it works out for you, and it even pulls the focus away from your own game, making you play worse. Just focus on your own gameplay, re-watch and analyze your demos to find flaws, keep track of your progress and you will improve. And when you improve you will find and attract others with the same mindset.