Haha. That's actually quite correct.
Yeah. I believe people get mean as some sort of coping mechanism. When players have played the game for a few years and still get trounced at building by people who have played a lot less than them, they lash out at others because they feel they cannot play the game properly.
People who are good builders have no self-esteem issues, and can usually be found in the company of other good builders or helping a new player learn to build. The benefits of playing the game properly, being with friends who you are not jealous of, and helping other players makes seasoned builders very satisfied with the game.
This isn't to say that being bad at building makes you bad at the game, but people certainly feel that way.