This guy should get absolutely zero congratulations.
Getting your guild to kill all your realm-first competition? To essentially grief other players to the point of harassment?
I'm sorry, but that's just pathetic. I would be ashamed of even having those achievements if I was in your position.
But then again, if I deliberately did something like that then it'd be clear I didn't give a shit about anyone else, and thus would feel no shame at resorting to such underhanded tactics.
No doubt I'll have all kinds of people going "lol u so jelly" and so on, but then again, it has to be said. I despise anyone that acts in such a way - it doesn't matter if it's video games, sport, business or whatever. Have some goddamn integrity.