why do you think d&d made sandor such a crude almost gross character? because in the books hes not really a “mans” character if that makes sense? he’s like borderline poetic and self conscious and he cries damn near all the time but the show kinda made him into some “oh hes a badass and hes gross guys will love him” character which was a strange creature decision
The frat boy show writers cannot write original material for any of the complex characters of asoiaf - and least of all one like Sandor Clegane.
They absolutely cannot reconcile that one of the largest, fastest, fiercest warriors in Westeros also:
cheers Tommen's jousting play
gently wipes Sansa's mouth
carefully encourages her to dress
gives nicknames to Sansa and Arya
takes Myrcella's side over Joffrey
cares about the welfare of his horse
knows and secretly enjoys the same songs and fairy tales as Sansa
noticably takes care of his appearance as best as he can
commissions clothing with his house sigil and wears them on special occasions.
sings, laughs, visits bars and brothels
expresses his vulnerablity both emotionally and physically to Sansa and Arya
attempts to comfort grieving Arya and Sansa
House Clegane is a relatively new, smaller house of landed knights - they are not considered smallfolk by any means in Westeros. And there is nothing in canon to indicate that Sandor is unclean, constantly eating and drinking, or swearing, so show!Sandor is the creation of the writers (except in the episodes GRRM wrote).
D&D and Cogman view belonging to any house other than the most powerful in Westeros, as synonymous with being one dimensional, dirty, vulgar, rude, unhygienic, with no manners or social skills.
When asked which asoiaf house they identified with, both D&D immediately answered "House Lannister", which, considering the way they mistreated Sandor Clegane, seems accurate.
They obviously were going for cheap laughs as well. Portraying Sandor Clegane as a bit of a joke allowed them to keep his character development on the shallow side for the majority of the series.
Of course this completely backfired on them, because it rendered his time in recovery meaningless and made his final confrontation with Gregor an unnecessary regression - just like everything else in S8.