residente is a skilled player, or "pubstar" if you like, from the EU community. He is known for being a nice guy when he isn't around people like Skydie.
residente is the prodigal disciple of soedenone, who taught he all he knows. The only reason it is emphasized with residente and not with others that soedenone essentially taught the game - like Diipadaapa, Climax, Corsa, ThELuXe, etc. is because the two are known to be on quite good terms, and soedenone believes residente will at one point transition into the Greatest AoS Player in the History of the World.
From what we can see, residente doesn't like the inhouse community that much, not because he dislikes the people or the games, but because he really doesn't like waiting around one hour for a game to start.