Yeah, I'm never sure how familiar anyone is with DA but I thought since he IS a really grumpy, hateful elf you might have accidentally switched some of the info around to that hes' hateful TOWARDS elves rather than being an elf himself. But Fenris is fun, he's like a grumpier, elfier TRC Kamui lmao.
Sera hates everything that's "elfy", since she grew up in a human city. And she H A T E S magic with a burning passion, and the dalish elves and magic are usually very intertwined.
Solas himself is complicated, as he's an old as fuck elf (and spoilers spoilers) but believes that the modern-day elves have lost their way and basically suck and he Knows Better than Everyone Else. It makes him a bit pretentious and snobby about elves and elvish "culture" (he'd use the quotation marks).
So maybe it's one of them? I can't think of anyone else who is like HATES ALL ELVES, in general a lot of characters have really stupid views regarding elves? Dorian, for example, comes from a country where elves are often slaves and early on in game he believed that slavery was preferable to them than poverty and living in their alienages. Anders hates FENRIS, who is an elf, but that's more because of his anti-mage attitude than his race.