The point of Sandor Clegane is that he is brutal, violent, and broken.
Every character in ASOIAF who is in King’s Landing is playing the game. They’re using deceit, manipulation, charm, love, etc, to control the world they live in. Every one resorts to violence, everyone.
Sandor matters because his violence, his brutality is different and it also evolves. His violence and brutality are never for himself; He was forced out of his home at the age of 12 by a murderous brother and swore himself to the Lannisters to avoid the Clegane Keep and his death (both his father and sister died under mysterious circumstances; I am certain he was next). The way that Sandor kills appears particularly gory, but it is effective. Chopping a boy near in half means that that boy did not have time to register what was happening to him or feel pain before he died.
His violence and brutality soon find root in his own wants, but it is not selfish. It is to protect Sansa Stark. He kills for her. Narratively, he will probably/very well could die for her. It is easy to say that outright violence is bad, that steel through bone is immoral, nasty, and corrupt, but the point of this series is to flip modern standards and fairy tales on their heads. Where do you place a man who sheds blood as a means of survival (his story is Arya’s, but a cruel family instead of a loving one, confinement instead of a life on the run)? How do you judge someone who is an accomplished killer when they begin to kill to protect an innocent young woman?
Sandor Clegane ties into both of the Stark sisters. This is literary fact. SanSan shippers aren’t making this up. Sansa and Arya are two sides of the same coin; Valar Dohaeris, Valar Morghulis. Sandor represents both of these things. The Hound serves the Lannisters, unfailingly, without question, and then, The Hound dies (which is an entirely different place of discussion). He teaches Sansa how to better serve, how to survive. He is with Arya when she is surrounded by death, he teaches her how to kill. After the girls are separated from Sandor, they both go on to lead more advanced and exaggerated modes of serving and dying, Sansa’s roles becoming more encompassing, more challenging, Arya herself having to suffer little death after little death and take the lives of others. And I don’t think his role in the Stark sisters’ lives is over or even of questionable importance. Let’s look at Bran’s prophetic dream from Game of Thrones.
There were shadows all around them. One shadow was dark as ash, with the terrible face of a hound. Another was armored like the sun, golden and beautiful. Over them both loomed a giant in armor made of stone, but when he opened his visor, there was nothing inside but darkness and thick black blood.
Boom. From the get go, he is an important part to their story.
Now, his specific relationship to Sansa…
I’m not even going to address this. You’ve clearly decided not to get it. But if nothing else, you have to accept his literary relevance to the journey of the Northern daughters, to the two sides of the same coin.
As far as morality goes, surly alcoholism is fucking quaint in Westeros, particularly King’s Landing. If you don’t understand that, feel free to ask me questions in my ask. I will answer. Anon is on. Have a good time.