How do I get better at CS:GO?

Learn the spray patterns of guns, get a lot of hours on each map so you know likely routes, Drop your DPI to like 400 if you want to get really good, theres a reason all pros do it. Work on your reaction times so that you dont panic when you see someone and just react by firing at a spot they are likely in. A good headset is important, TRUE 7.1 surround sound is overated, you just get a poorer sound quality when the virtual surround in the source engine is already really good.