The real ending of the game...

[Dear next of kin...]

When you get to the end, and you see Abby tied to the pole. Don't go near the pole. Don't interact with it. This is the ending, the real one. The game seems to think Ellie would save her. That's stupid, she has no reason to do that. You just stop, sit and watch, as Abby gets the slow painful death she objectively deserves. She will die there without your help. So get a good look at her. Then just turn the game off. The story ends there. You won, Ellie delivers justice to Abby and goes home. Congratulations you just salvaged some of Druckmann's terrible writing.

[Laurence I of Yharnam]

Originally posted by patrick is away:

Originally posted by Dear next of kin...:

I like where you're going with this, but that makes it way too short.

You're so obviously miserable that it's almost painful to watch.

Yawn...

[halbermensch999]

Originally posted by Dear next of kin...:

Originally posted by halbermensch999:

What proven ideology? she hates the Seraphites / Scars and ends up fighting for two who has freed themselves from it, even turning against the WLF.
She most certainly changes her mind throughout the game
Abby let Ellie go twice. Ellie has no reason to think Abby is after her, Abby is far away from Seattle by the time Ellie goes after her again..

What Abby's father did to get himself killed was irrational by any logical metric, and he was objectively a bad person.
The fact that after his death Abby overlooked all of that and instead spent years planning and carrying out an assassination to avenge him shows she shares the same irrational ideological bent as he did. Only an ideologue would not realize he was at fault for his own death, and he wasn't worth avenging.
Her flash back shows her as a relatively stable person, until the inciting incident of her father's deserved death. She then becomes obsessive, single minded, ignores all information that would contradict her goals, and is willing to use others to get what she wants. These are all traits of an sociopath. She drops all these traits as soon as she kills Joel, i.e. gets what she wants, and 'avenges' her father, thereby proving his righteousness. What you call growth is simply masking behaviors that are used to hide the fact that she is a sociopath and present herself as trustworthy to those around her. Ellie is the only person she drops these with. She allows Ellie to live cause when she was killing Joel she made sure Ellie would watch. According to her ideology, Ellie is not righteous like Abby is, so she could never actually be a threat. Abby sees letting Ellie live as justified punishment, and if she killed Ellie, it would nullify the act of making her watch Joel die.
All it would take for Abby to go right back to her sociopathic behavior is another inciting incident, and that incident does not need to actually be justified or make sense, as her previous vengeance kick never made sense.
As evidence, if you do interact with Abby when she's on the post, she puts on a manipulative act of begging for help as if she's on the brink of death, until she recognizes Ellie, and even when she sees Ellie pull out her knife, she never once shows fear or remorse. Because she still thinks she's righteous and Ellie is still the witness to her vengeance and being punished.

He was? You know much about him? it's very likely that Abby's father caused a lot less deaths than most.

"and is willing to use others to get what she wants."
You mean like normal people do. Suppose someone steals your bike, if you knew where it was and the police wouldn't help you, wouldn't you got with friends to make sure you got it back? Abby is clearly not happy about losing her friends either, but when Ellie's adventure gets Jessie dead she doesn't exactly feel a whole lot, instead she's still stuck in the grief of losing Joel... and as others have said, both Ellie and Joel leave more bodies behind them. Abby's killing of Joel backfires and she clearly understands this, Ellie is even more in an emotional state where she doesn't quite understand what she started. She has a moment of horror when the pregnant lady is killed.

None of them are sociopaths, it might just as well be any modern conflict which goes on and on because someone breaks any form of truce. The normal cycle of violence..

And since we know Abby has a high position in the military, as already stated, she was to lead one of the operations against the scars...sociopaths do not tend to leave positions of power as they like to be elevated. Instead she leaves it all behind..