You seem to not understand, year has nothing to do with it.
And yes your a genius WoW was out in 2002... Oh wait it launched 2004 and Kazzak wasnt until BC.
Again, year doesn't matter though, unless you are suggesting that all video game players in the world have gotten better in the last couple years so designers need to make harder content.
Open world bosses are never super complex fights, as someone else said, so randoms in that zone can group and kill. Not to mention this is a low level world boss designed for players without a lot of talent points or all their abilities yet... Its in the 3rd fucking zone, level 16-20.