Hello!
I enjoy your work most of the time, the anime choice is surprising but fitting and you can tell you put a lot of effort in making all those effects. This video is not bad at all it has good pace and you used your FX to support your synchs and overall atmosphere.
However, it was hard to put it any higher than it is mainly for two reasons. The first is the cleanliness, some masks were probably made in a hurry and edges sometimes aren't perfect. You also have some more discutable FX, like the typography you used could look better. Masks are also not that well implemented, usually you limit yourself to using a background and maybe adding a light color FX and that's it so not all combination worked.
The second reason is the lisibility and repetitivity of it all, due to the large amount of backgrounds you used, it becomes quickly messy and the scene selection can get limited because you always want this kind of plan where you can add a background. One other very distracting issue is that it's really easy to spot what background you used, like those scenes from deadman wonderland opening or from Kiznaiver, you don't appropriate those for your own editing.
So yeah, I really enjoyed parts like at 40s and some others where the flow and pace are really hype but the more you go into the video, the more you get distracted by the issues I pointed out. I wish it had a bit more control and it was a bit more clean and I'm sure it could have easily entered the top 10. Still a good job though, keep it up!