A someone who has a liking for Sins, I have to point out this issue briefly. Multiplayer culture and good attitude are lacking in the Sins community, in the Rebellion beta: the purpose in the Beta seems to be acquiring the highest number of wins. Veterans who brag and insult, are an issue, but a minor one, compared to quitting games when the action is still going (and thus leaving the other participants with whatever remains). Overall, if someone cares about the quality of matches in mp in rebellion, something should be done to discipline the situation, like promoting different customs and more politeness, getting a league going, etc. Otherwise, and I say this from past experience, although the game is fun, it will never become a serious online community, as there is lack of the premises to do so.
Besides, another thing veterans should relaize, is that teaching new players will improve the experience by improving competition. Yet, if the purpose is winning more games, this can't be the right move, can it?