Neverwinter had a surprising amount of this kind of people...
What I also loved was this one guy who rolled for every bit of equipment the dungeon dropped even if he couldn't use it. Even worse, he even got over half of it. At the end of the dungeon he died while fighting the boss and absolutely no one wanted to pick him up again. XD
Here is the way I look at it. You have a life outside of video games and thus may not have had time to build up you character/start playing the game. This person has no life and thus spends most of his time (and money) in a land of make believe trying to make themselves feel good.
There's one in every group and/or franchise of the MMORPG world and people like him are served as a warning rather than an example. In other words: A sadistic, insufferable, hubristic putz. It's an inevitable experience and I sympathize with you on this. People like him deserve to be alone in cyberspace.
Those guys are just the type of people who can't handle the fact that they started like you. So they end up imitating them to prove their superiority complex. At least, that's what I think. Anyways, hello.