I can't remember if I posted about this or hinted at it before, but I have this pocket headcanon (with no basis in canon whatsoever) that Ardos is a writer.
He picked up the hobby in his teens, at the suggestion of Eldes who was just trying to find something for his brother to do to manage his anger issues. Ardos rejected the idea at first because "what am I, some little girl with her pink diary?🙄" (<- little shit) ((Eldes also told him so)), but ended up trying it when he felt particularly emotionally overwhelmed one day. Instead of journaling though, he turned to fiction, developed a habit and it stuck.
Ardos' writing is more or less what you're thinking now and might expect from him. Lots of violence, power fantasies and freaky stuff, sometimes erratic, sometimes reading like the confessions of a serial killer or psycho - because, unlike most writers who just imagine scenarios and cope with things, he actually is the kind of person capable of committing some of the acts he writes about. On the flipside, the portrayal is spot on and sometimes there are surprisingly deep and accurate observations. And there is a part that's just coping and/or fantasy; as with many things, there is no black and white.
Eldes knows about everything, but is honest about the fact that some of this isn't for him, which has resulted in the long overdue development of Ardos creating a space for himself that is uniquely for and about him and not relying on his twin for constant support and validation.
Eventually, he took to posting his works online under a pseudonym. What first was a means to an end slowly began to become its own character, an alter ego that Ardos enjoyed shaping and assuming the identity of; a subsconscious part of him realized that being him is pretty miserable at times. Using this alter ego, he even managed to finally put some of Eldes' advice - mostly boiling down to "maybe people will like you if you stop being a dick to them" - into practice and liked the results. He is, on a fundamental level, still himself, but for his standards a strangely productive member of the online communities he's in.
No, Ardos failed to take this lesson to fully realize some things about himself and his own life. In person, he still masks his insecurities with arrogance, responds to perceived attacks with anger and violence and denies the humanity and value of those he deems unimportant or enemies of himself or his faction. No, writing on its own is not capable of fixing him or preventing him from doing horrible things.
But I suppose after the events of XD, Ardos has a lot to write about. And maybe, just maybe, he will one day understand that he's better off exploring the things he's good at and that bring him joy instead of trying to earn his father's approval and being in a cult.