I gained the next level of appreciation for how well Dragon Age 2 understood trauma, the ugly side of it.
I don't blame Fenris. I understand why after enduring years and years of abuse, humiliation, having your autonomy, your memories, everything that constituted you including your own name stripped away from you, you have no empathy for anyone reminiscent of your abusers - especially if nobody came to save you in the end and you are the only one fighting for your life and freedom. I understand why upon hearing how someone (who reminds you of your abusers) suffers unfairly, the only thing you can say is "Good" - and lash out at anyone trying to tell you off for it. Where all these fucking preachers were when you were suffering? Why even in the land that is supposed to be different from your own hellhole, your word and your experience still don't matter?
I don't blame Anders. I understand why after being betrayed by your own parent, after the decades of listening how you must suffer for the sin of being born, being confined to isolation, being treated like a monster while being a child, being denied the simplest of comforts, you fiercely defend people who share your abilities - because nobody else would ever look out for you and them. Of course you would clash even with someone who has legitimate reasons to be negative towards people like you because your own wounds sting more than their pain. You have dealt with the Chantry's vile propaganda for so long, you no longer take things at face value. Of course, Chantry would say that the foreign land where mages rule is foul, and corrupt, and full of blood magic and demons! So many times rumors, lies, and twisted religious depictions have been used to abuse, lobotomize, and enslave you, you're no longer letting it happen - and you only believe what you see and hear. And all you see around is injustice and indifference. And you're only the one screaming into the void, raging against the horrors everybody else is willingly blind to.
I don't blame them both for losing their mind in their own ways while the rest of the group silently wondered why they couldn't just be normal.
Personally, I don't think there was any chance for them to become friends or make peace during the events of the game. The "I suffered so I don't want anyone to suffer like I did" or "I'm a bigger person" are pretty lies and half-truths at worst. At best, they are mindsets only possible after someone who suffered finally feels safe and can be out of their survival mode. Which is not really true for Fenris and Anders, even during the final act of the story.
Even on high friendship or romance, Anders is still self-destructive, ready to die at Hawke's hands after launching his plan in motion. Even with a friend/lover at his side, he is alone in his head, in his vision of the world, in his pain.
Even with proper support and help, it takes Fenris three years to accept a relationship, but it doesn't change his perspective and if you don't have enough of his trust, you lose him to his trauma-based response.
I may be overthinking it, but I am truly thankful to the game for not toning down the complex, hard and uncomfortable aspects of trauma. People have always been in love with the concept of the perfect victim (who hates only "the right" bad guys and suddenly knows when to be tolerant, nice and accepting and doesn't say any rancid and hateful shit ever), but it became particularly aggravating lately.