Do you live in a 3rd world country where people die at 40 or something? he isn't close to looking like he dying.
And Ya id say he look's more elvish then adar though mabye not by jackson's elves. Cant think of a single elf in any franchise ever that has looked gaunt.
Ya that's quite a lot of Varity and there is obviously gonna be different looks within all those groups.The only differences mentioned about orcs are the subraces whitin the species, like some of then being smaller that would be called goblins or the snaga, and the big and darker ones that lived in mordor, then the ones who were mixed with humans and other goblins.
I mean the show describes him as an orc so he fits by default even if he might not mesh with the others.Adar doesn't even fit the proper description of the orcs within the show he is 200% different from the orcs they showed so far.
I mean jacksons orc's don't fit what Tolkien mentioned either, Adar atleast looks like an elf who became "evil and savage" unlike what have got in the jackson moves or the other RoP orcs.Adar is literally an elf with a charred face, he does not share any characteristics whatsoever that Tolkien mention when talk about orcs. Thats why is dumb to say "they are showing orcs in a better light" talking about Adar, when he is straight up an elf in appearence. Or for the show, a Moriondor, who eventually breed the actual orcs.
I checked the two towers, that quote is in there word for word. as to yours It might be in the jackson movies I'm not gonna check those but it's not in the English Simarlion so unless you and jackson read it in a different langue he just made it up.There is no mention in the two towers afaik, its mentioned in the movies, because Jackson took the version that was published in the silmarilion, that was made by his son.
Ya no it doesn't suggest they were monster/goblin like at all, all it points to that the elves saw elvish features in them if made evil.Of what they "were" suggest they were no longer somewhat elvish, and are more close to the monster/goblin like he describe later.