Two-Face's story is so sad. I honestly feel really bad for him.
I kinda blame Arkham Shadow for this. Not in a critique way but in a "how could you do this to me" way. Like he has this horrible childhood where his father physically abuses him, his mother and sister leave him to deal with his father alone and apparently his father also had a duality disorder.
Then there's his friendship with Bruce. They were childhood best friends. Then when Harvey gets the acid thrown on him, their friendship gets destroyed once they became enemies as Batman and Two-Face. It's sad to see them go from childhood friends to mortal enemies. Even when Two-Face knows who Batman is in Arkham Knight, it doesn't really change anything so he maintains this hatred towards Bruce and still wants to kill him.
It's not just the Arkhamverse Two-Face I feel bad for. I also feel the same way about the BTAS version. The softie in me partly likes to imagine he someday can turn his life around and be good again but then I also know the Arkhamverse isn't big on happy endings. It's usually bittersweet at best. Not that I would expect them give us a light and happy ending. It's just sad that it can't be expected for some characters.