The online community has it's own "rules". Don't play by them and you won't get a MP game at all. Play by them and you get crushed and scorned by the experts, who of course are massively skilled with the one specific playstyle permitted.
Effectively, online Sins is an elite old boys' club.
It's kind of cliquish. However, many of us are aware of the fact that we need new members and that we need to encourage noobies to play the game online. Most of the time if you just tell everyone that you're newish and follow your allies' advice in the game and be polite, you'll be welcome. If you make the investment of playing 50 PvP games you'll get up to speed and be able to hold your own.
What "rules" do you take objection to? The Faster speed settings? We need the Faster speed settings and Quickstart to reduce the amount of time it takes to play the game. The problem with most of the standard non-random maps is that they just don't work very well for PvP games, such as the multistars (which take longer to play and result in lag). Sometimes people will host non-random maps for 2v2 and 3v3 games because some of those maps are OK.
Of course, the more people who have the cajones and desire to play online multiplayer PvP, the easier it will be to host and fill games on the non-random maps or with different settings. The percentage of pros online who play PvP would also decrease. Instead of whining about it, why not come online, be patient, take your nooby lumps, watch replays where you can study the pros so that you can improve, relax, and just enjoy the process of becoming a tougher and tougher player and an increasingly bigger pain-in-the-ass as you gain more and more experience? Treat it as though you were a noob just learning to play an FPS game--you're going to get killed 5 times for every time you kill someone else and you're not going to bring the enemy flag home, but you enjoy those frags that you do score and you try to become a better and better fragger.
