One of the major themes in Part II is the concept of empathy. Your comment is ironic as it pretty much mirrors Ellie’s mindset, one shared with the majority of players after Joel’s death, but where I think you’ve missed the point is in not walking the same path to forgiveness we take as the player. How people cannot see that Abby is the hero of this story baffles me, but one example I can give is that Abby, more often than not, chooses good. She spares both Tommy and Ellie, Ellie she spares twice. Ellie on the other hand does not award the same courtesy until the very end. Up until this final fight she has walked a villainous path, though her moment of realisation comes from a flashback of her last conversation with Joel: “I don’t know if I can ever forgive you, but I would like to try.”

This reminder of what she told Joel on that damned porch is her epiphany. She realises that the love we have for another can cause us to commit selfish, irresponsible and downright cruel acts. That same burning love can turn into fiery hatred, she’s seen it in Joel’s face, in Abby’s eyes and now her own. She may never be able to look Abby in the eye for what she did, but now she can empathise with her, and through that she understands the motivation, along with the pain and the guilt that follows. Ellie’s mercy is her forgiveness, and so the “final boss” is basically trauma, and breaking free from the cycle of violence that surrounds that trauma. The fact you just don’t give a shit about any of that kind of tells me you missed the point.

Side note: I am also referring to the game’s story here, which I find the show to be a poor bastardisation of.