cut out unnecessary parts of it like when you just walk around after kills

Hey man, i don't want to do it, beacause i want to hit the music

you can sync the music without that, just cut the clip and add velo

I know mate, but slowing clips too much is making them laggy and also not best for watching

Then record at 120fps+
I'm pretty sure there's countless tutorials on youtube explaining how to record csgo in 300fps

please get rid of the blue lines around the ct's.

set time to 0.1, record 60fps, get a program called virtualdub and convert it to 600fps
overall the cc gave me cancer, i honesly don't have anything constructive to say about it except the fact that you should change it. needs more cuts, needs more cines
you should try playing around with velocity.
PLEASE
choose a better song, ofcourse you're allowed to choose what you want but atleast choose something that won't give everyone eardrum cancer

you need better clips.