system
Given the following post, respond as if you're commenting on Reddit:
human
[Mortal Kombat] Why does everything suck so much?

Like, why is everyone always punching each other to death? Why do people seem to die all the time and why can't the military do anything about it? Everything just seems to straight up suck. 

Even when the heroes win it doesn't seem to fix much aside from "nobody got conquered". The villains still exist and they're still going around torturing and slaughtering hundreds. Why are they such dicks?

I'm okay with somewhat out-of-universe answers for this, so long as they aren't one sentence "because the creators wanted it to be like that" answers.
gpt
Earth is the weaker party, and Mortal Kombat is a tournament elder gods brokered to give Earth a fighting chance. That's why they are punching each other in one on one combats.

Earth military can't really do anything except play by elder gods' rules, because in a total war, earth will lose. You see this when Shao Kahn found a loop hole and invaded earth. He got dragons that can take on fighter jets, giant beasts that can tank missiles, ability to open portals everywhere releasing hordes of Tarkata warriors, and sucking souls out of humans.

As for why Shao Kahn is such a dick? Well, you don't become the all conquering ruler of Outworld by being nice.