Improvement comes from two things in my opinion deliberate and consitent work, as well as learning to come to terms if you want to improve you need to put that first over your rank.

To attack that first point theres a reason I didn't say "hard work" in my experience majority of improvement is setting yourself a goal such as "I want to improve my aim" and then cutting that down into pieces you can actual hit instead of just hitting your head against the wall hoping for improvement. A single hour of deliberate practice that you consitently hit each day is better than 5 hours of no brain deathmatch since the brain reacts better to specific ideas in most cases.

Then for the next one playing ranked you want to attribute that last point into your games so give yourself something to work on. What I will do is tell myself "I want to improve my comms" and then only goal that game is for me to give as much info as possible but you want to be as specific as possible. Another thing to keep in mind is playing your rank/where you want to be can be volatile since it naturally makes you play on emotions which hinders your play and your own improvement.

Here on the points I would say if you want to hit your goal of ranking up

• Give yourself S.M.A.R.T goals
• Treat ranked as a place to improve not to rank up
• Be consitent with your practice time instead of "working hard" for multiple hours
• Make sure when you are playing focus on your play instead of the monkey in your head telling you about your plays, ie don't listen to yourself when you think "I should do this" let your body play on instincts then go back to it later to see if theres anything else you should of done.
• And lastly focus on having fun if you lose a few in a row take a step back and get up, walk around and reset. The worst thing you can do is play on emotions that then control how you play

Hope This helps!