Yes they should look mer because they are I hate when people here think they should be monstrous.
Well, while I agree with you in the context of TES, lemme play devil's advocate for a second. Remember where orcs came from. The original Tolkien orcs were, like TES orcs, descended from ancestral elves, but in their case they were captured, enslaved and corrupted by Morgoth, a sort of rebellious, evil greater god if you haven't read
The Silmarillion. He wanted some vicious, nasty orcs and he got 'em.
Well, while TES orcs don't have the same backstory, it does have similarities. Apparently Boethiah literally ate Trinimac, the Aldmers' prime god, and literally crapped him out as Malacath, corrupting him and as a result corrupting a large section of the Aldmer into the Orsimer. So there's an argument to be made for a certain amount of monstrousness with TES orcs. Personally I think they're about right in Skyrim; brutal and somewhat primitive, but not so nasty as the orcs of Middle-Earth.