-I disagree with others on this thread saying it's "overedited" - I think that's not the right word for it, I think what people are reacting to is that a lot of your editing choices hurt the video by confusing or jarring the viewer. There's a pretty simple fix to this, which is: while you're editing, keep playing back what you've done and try to view it objectively. If your editing choices seem poor or jarring to yourself, they will be poor and jarring to the viewer, and you should try something different. This is what yerb means by "self-review."
-If you have to use clips where you miss a lot or are just running around doing nothing for a bit, use cuts (or other transitions?) to eliminate that dead time between frags. You seem to understand this concept but you only use it in some parts of the video for whatever reason.
-I honestly really liked 0:57 - 1:02, this is really great. The sniper frag was great, the kill happens as the beat drops, and the transition to the next clip was solid because you made the framing of the thirdperson shots of the sniper and scout similar enough that it wasn't jarring.
-Overall, hold yourself to a high standard of quality and spend more time thinking about how to use editing to guide the viewer's attention. It's great that you sync editing choices to the music but you need to understand when a choice is jarring or unpleasant to the viewer and then change it. Your video description says you only spent 7 hours making this, and it shows. You're not going to be a perfect editor instantly, but spending more time on projects will help.