Ending explanation? SPOILER ALERT

[^~Ethan~^]

Ok so i finished the game and from what i understand there are 2 endings a good one (you spare the dark ones) and a bad one (you kill them). Now the thing that i don't understand is why the bad ending is...bad? i mean they are the first great menace of the metro, they destroyed a lot of stations and when i kill them is a bad ending? I saw online the "good ending" and even then i don't understand how it supposed to be good! they killed thousands of humans and just because artyom just see some ♥♥♥♥ on his mind where they say that they want peace.....i don't understand why the main protagonist just change his idea all of a sudden after all his friends died in front of him. In the beginning when you encouter the first ranger (i don't remember the name) even him says that they are a menace not only for the metro but for the entire umanity. So in the end...in what way the good ending is good and the bad one is...bad? I thought when i played this game for the first time that i did the right thing...help :(

[RadioActiva]

Finished the game last night (i got bad ending lol) and came up with this :

I think the dark one are not evil (although scary), they just want to communicate with metro dwellers but because dark one and human minds are different, the visions became scary to humans and humans think they are evil.

So the conclusion is the human did not understand them fully and they blame the dark ones instead of mutants

[Sovereign]

This is explained more fully in the next game but basically the Dark Ones we’re never evil and only wanted to understand and help humans. This is heavenly implied throughout with their words and visions, notice how they are never threatening to Artyom until the end of the game where they act in self-defense.

The people they killed were either by accident (human minds incompatible with telepathy) or in self-defense when humans attack them on sight.

And they didn’t kill thousands of humans, only the guards and patrols at the exhibition station.

[Lapanen]

According to the books the black ones wanted to help the people of metro.
Also artyom was not the only one who knew about the black ones.Melnik also knew about the black ones and later even had regrets of killing them.