Well I opened the link not expecting much considering you seem to have some kind of irrational fear of capital letters, but was surprised to find that your grammar is actually considerably better when you put some effort into it, so props for that.
As for the story itself, it's kind of unintentionally hilarious. You realize that the Edgelord Contest ended awhile ago, right? Regardless, I did genuinely laugh out loud when I read the emo cringiness of wanting to kill all those faggot Americans and not giving a fuck about the Jews being gassed. I'll be honest, I kind of love it!
As for whether or not you should finish it, honestly, it depends on whether or not you actually enjoy writing it. If you're only doing it to impress people, don't bother, like you said, the person you're trying to impress will probably never see it, so there's no point. On the other hand, if you're writing it because you genuinely enjoy writing it, then definitely finish it. Nothing is a waste of time if you have fun doing it. ^_^