Make a team to play with, If you try to play with random people you will never get a good rank because there are a lot of toxic people in this game so play with people who have the same desire as you
I don't know your rank, but I was Supreme for a long time playing only soloq. The best way to rank up is to get to know the maps really good. Learn about angles that you can hold on ct side and prefire on t side. make good uses of your nades. ask me if you want to know any specifics