People hate on the ending of Mass Effect 3 for a variety of reasons. For me, it's the way they, like.
They know. The developers know that the Destroy ending is the obvious correct answer. The kneejerk reflex after all this fighting is to want them destroyed.
That's why they arbitrarily hold a gun to EDI and the Geth's heads over and go, "You better not. You BETTER FUCKING NOT. I'll shoot. I SWEAR I'LL DO IT."
Which completely ruins any philosophical nuance that deciding the Reapers' fate might have. "Should we seek symbiosis with them, take control of them, or kill them and also murder a bunch of other unrelated people in cold blood too why not?"
They knew the choices they were offering weren't very compelling. So they put a hand on the scale.
Because the thing is? Destroy is the kneejerk, of course. But after much consideration? Objectively, Destroy is the right answer for the Reapers. Or would be if they didn't have that gun. The very existence of the Control ending proves that.
The problem with Control as an option is that it eliminates the Reapers' capacity for agency. The ME3 ending states in no uncertain terms that the Reapers are slaves to program. They obey the Catalyst unthinkingly. They destroy societies in an endless cycle because that is what the Catalyst believes is best, based on his own ideas.
He, the Catalyst, is a self-aware AI.
But the Reapers are not. They just obey the Catalyst. For all their bluster in ME1 and 2, for all Sovereign and Harbinger like to talk big, they're all just word-processing. The Catalyst is the only thinking machine among them.
And the proof of that is that if Shepard replaces the Catalyst and sends them contradictory orders, the Reapers all universally obey the new protocol without question. They're in the midst of destroying worlds when the program "Do not destroy these races," comes through. And so they all drop what they're doing and leave without an ounce of hesitation or consideration.
Because they're just obedient machines.
And if that is true? If they're not intelligent, free-thinking artificial life like the Geth or EDI?
Then what value is their existence? They're just complicated warships built for genocide. That is the totality of their being.
And if that is true? Then why would we "seek coexistence" with brainless killing machines? Why would we want to control them, to arm a god-emperor with an armada of planet-killing super-weapons to keep the galaxy in line?
If Reapers obey the Catalyst unquestioningly, if they will obey Shepard unquestioningly, if they are just unthinking and unquestioning machines....
Then obviously we should just destroy them. That is the conclusion that the Catalyst and his choices inevitably brings us back to. If they're just the Catalyst's weapons of slaughter and nothing more, then those weapons of slaughter should not exist. They should all be destroyed and their destruction celebrated in the same way we would celebrate all the world nations disarming their nuclear arsenals.
But the game says no. If you destroy the Reapers, you destroy EDI and the Geth. Because it thinks they're the same, even as it introduces this plot point that completely upends any claim the Reapers have to being intelligent.
In the end, the final choice of ME3 is flawed at a point of basic principles. I reject the notion that it's founded on, that what you choose to do with the Reapers is a reflection of your beliefs towards EDI and the Geth, and their right to coexist with organic lifeforms.
The ending itself told me that.
