Yeah, don't get final cut pro. It doesn't support many of the plugins that are used for editing in sony vegas and after effects and it's missing so many of the features that are there by default.

That doesn't make it any less useless, editing a movie and editing game clips are two extremely different things, unless you're really pretentious.

Anyway, I can see that you're trying to have some sort of sync to the video, but the way you do it can be improved. From what I can see, you drag the clip until the shot is synced (which is how I used to sync when i started) rather than increasing the velocity to sync it, which will give it more impact. This is a useful tutorial if you want to learn how to use velocity to sync first person shooters in sony vegas (1:22 is when it starts).

I noticed that there is really obnoxious hud in the bottom of the video. I personally don't get that in csgo so I don't know how to get rid of it, but definitely try to do that.

Your clips have black bars on the sides, so make sure you're recording in the right aspect ratio and that your game is in a resolution that will take up the whole screen. Common ones for recording are 1920 x 1080 and 1280 x 720, but feel free to go up to 4k if you have a beast of a computer.

My discord is Glimpsed#7133, if you have any questions.