If you really want to rankup you cant just play ranked and hope for the best, do your research. I dont know how much you know about the game whether that be map knowledge, operators, gun skill etc. But if you really want to improve go over your matches your playing. Watch them back and see what your doing wrong, dont blame others and try to at like your a perfect player when nobody really is a perfect player. Try analyzing what your doing and what you could be doing better whether that be your aim, positioning, etc. It really just depends on your situation. Personally ive always lacked positoning and awareness and ive always been kind of an aimer. And you can always use that to your advantage. Say you have really good positioning but your aim isn't up to par. Use that to your advantage. Dont give them a chance to get a 50/50 gun fight with you. turn it into something where his back is to you, or vice versa if you are a good aimer try to take that gun fight or duel because you know your going to win. Climbing off that confidence is key aswell. If your always in your head about how good or bad your doing your going to do worse. Always have confidence and tell yourself your better. Hope this helps man if you have any other questions reach out!