I'm looking for a story were Discord is basically treated as the god that he is, what I mean is that if he gets mad, nobody is safe. This story should be complete as well, and I don't really care what the genre is, as long as someone is being intimidated by our chaos lord.

Can't say I've heard of any before?

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Hmmm... Neither have I. But now you have pipiqued my interest as well.

...Oh wait maybe you would be interested on this. (I don't know if this is exacly what you are looking for but it is a good read. The first "season" of the story is complete the second is still incomplete.) https://www.fimfiction.net/story/198426/discovering-friendship

I mean... https://www.fimfiction.net/story/45860/diaries-of-a-madman isn't complete, but it is a story that fits your description.