Have you looked at what you wrote when you got that score? Although I couldn't find the specific argument you were referring to, I did find three arguments with scores of -12 and frankly I can't find a single argument that shows any signs of intelligence. So I will endeavor to enlighten you as to why you have such abysmal scores for these arguments.

Case 1: "i dident down vote you you stupid tool >.> have you even played halo wars??? you proberly havent"

There are three misspellings out of eighteen words, that's sixteen percent misspelled. Additionally out of what I can only assume is supposed to be three sentences there are zero capitalized words. In short your complete lack of grammar makes your argument utterly irrelevant, unduly antagonistic and completely lacking in substance.

Case 2: "have you played halow wars??? it is fun too send sme grunts at some one then you find out they have a fleet of vutures coming at you so you have to get shit loads of aa defence or your ed or u send a marine to scout and you see a scarab coming to you so you shit your pants"

I won't go through the spelling and grammar again, as I think I've already made my point. However I will point out the ridiculously immature syntax of this "paragraph." I've seen eight year olds that can write more eloquently.

Case 3: "this is DA BOMB it owns you can make scarabs charge at your enermy make big armys and it gets updates"

All I can say is anyone who uses the phrase "DA BOMB" seriously deserves to be shot. And finally, the utter ignorance of the opposition isn't frankly inexcusable: Red Alert 3 has two out of your three criteria for being "DA BOMB", whatever that's supposed to mean.