It's not a bad story. It's also not a good story. It's not a story that offers you much besides the fact that "oh hey I killed Gendo because I'm a Fury and that's what I do".
A concept. A plot. An exploration of characters or setting. An interesting interpretation. A reason to invest oneself. A sign the author has invested themselves. This story doesn't really care about doing any of those.
It's short enough you won't feel utterly cheated, but the bottom line is that the story doesn't seem to know what it's about or why it's being told. Without an answer to those questions, there's little reason to recommend it.