Seen it.
Your claim that Link is evil is extremely flawed.
1. He'd never be able to even touch the Master Sword if her were.
2. He's never killed anyone, only destroyed evil creations of Ganon/ressurected and/or destructive monsters that *will* kill peopleif he doesn't destroy them.
3. His behaviour is antithetical to what evil is.
Link goes around helping people, for no personal gain, at the risk of his own life, and cost of his own time and suffering. Link when presented with a foe that is not irredeemably evil will not kill them, simply incapacitate them, as seen in OoT/MM. Infact, Link is often *worse* off at the end of his quests, having lost a great deal of what he had before.
Kratos kills people, if they get in his way, they have something he wants, they're ugly, for the lulz, because he can, because he's evil. He's an ass. He's incredibly selfish and everything he does (minus one act) is motivated by this. Sounds like a real hero... Ohwait.
You're under-estimating the triforce of courage and master sword and what they can achieve working in tandem, in the hands of a more skilled swordsman than Kratos, who's never seen to be able to replicate Zeus' feat.