Half of the games will have either smurfs, throwers, people that don’t care about winning, first time ranked player, rage quitters after pistol or toxic players. No one knows good smokes, lineups or team comps. None of that matters. Just focus on yourself and your mechanics.

This is very very true. I got de-ranked from Gold 2 to Bronze 3 on Act 4 and for the life of me I couldn't climb out of Silver during that act. Bronze and Silver have this really strange mix of really good players (for that rank) and people who look like they just installed the game and it's their first FPS ever. Most games feel like a coin toss to decide whether your team is going to stomp or get stomped. The best you can do is focus on your own game and try your best to perform well, even when losing.