As some may know, Counter Strike: Global Offensive is a online multiplayer, team-based game that requires skills, communication and so much more features. Its famous game mode, Competitive Matchmaking, is a true arena for players to play with people similar to your skills or higher, and it is also a place for you to improve your skills. However, there are many factors in the game that, you thought they are not a big deal for you, but they are when you are actually in a game:

+) Smurfs. I know that it is hard to believe right? But smurfs are everywhere. Even if you are playing against a Silver 2 player and he outperformed everyone in that match, the high chance is that person being a smurf (or a hacker if you know how to recognize it). Ranking in CS:GO is so complicated that, for a mastered player who has Global Elite rank who left the game for, say an year, and when that person plays again, their rank got reset and they have to play again to get the rank placement. Usually they will get a lower rank than their old ranks, and they have to play again to rank up back.

+) Trolls. Believe me. Either a troll in your team or their team, it will still make the game's mood so intense. If you have a troll on the enemy side, good for you; but if a troll (or more) is in your team, they will turn your 45 minutes of gaming into a disaster. They are the people who don't care about winning or losing, and they want to ruin other's game for fun. Some people trolls when they want to, and they queue up with friends so that they can never be kicked out of the match.

+) Hackers. No need to explain how bad that is.

So, after many tips/guides videos from pros/high rank tier players, here is what I learned from them and I find them really helpful:

+) Mouse Sensitivity and DPI: Don't think this is not important. Mouse movement affects A LOT on your crosshair placement. If you set your sensitivity too high, your crosshair will move far away from the target you want to aim at, and vice versa; if you have a low sensitivity, your crosshair will not even reach the destination it has to go, and you will have to put a lot of effort on scrolling your mouse, and you might be dead already when you have that crosshair on them. Try to spend an hour learning about your mouse's DPI and sensitivity to find the best sensitivity that suits you. More information find in this video: https://www.youtube.com/watch?v=uxBuiD11WDM&t=203s (Credit by corehaven)

+) Play with your friends: Try to play with your friends more frequent than playing in SoloQ, as your communication with friends is better than playing with strangers, and friends do not troll like others will, because you and them have the same goal: to win the game and rank up. Also, playing with friends is more fun than playing with strangers. People usually ignores this tip, but if you want to rank up faster, always try to queue with a friend, or a group of friends.

+) Practice: Like our grandfathers said: Practice makes perfect. There is no success that comes to you so easily without skills. The only way to improve your skill is to practice. And you have to master 4 key features: Aim, Movement, Communication, Analysis. Practice your aim and movement in a custom map private server (which I suggest map Aim Botz - Training at first), join some community deathmatch server to practice; Communication through friends games. Analysis is very important. To improve your Analysis, you need to fulfill these requirements: You have to know where the enemy will go; the spot they usually hide for ambush; spots to throw grenade, smokes, and flashbangs effectively; positions of the awpers; time takes for the enemy team to get to their position; and LISTEN. Many silver players I played with never know where the enemy comes from, when you can get the information of them through footsteps and gun sounds easily.

+) Improve your mindset: This factor plays an important part on the result of a game. All tips I want to give you is that: This is just a game, if you lose this game, there will be another time for you to get better; don't flame your teammates, try to cheer them up; don't disrespect anyone in the game, as they will return stronger after few rounds; don't give up. As long as you can still focus on the game, think positively, and encourage your teammates to play better, there will always a chance for a comeback. Always.

+) Warmup: Before you enter a competitive game, always do a warmup, like how you always do in gym exercises. It helps you to get the feeling of aiming and movement that you lost after not playing for a while, and it is a good preparation to enter the most intense arena.

Good luck in the field, soldiers!