How can i get better at csgo

i mean there are many ways to get better in CS but here are some main things that could improve your skills tremendously:
1.) Practice spray pattern control ~ this is legit the main reason for people sucking is because they just spray and pray and its good to actually know the spray patterns so you can actually hit the target your aiming for...
2.) pre-aim the places you believe people would most likely be.
3.) know the locations or call outs for the maps your playing on because if you die and you don't know the callout how will you help your team.
4.) and if none of the things above work you might as well just download a hack client and go kill people that way.

~unethical