Part of my own problem with playing online is:
1. I am terrible. This is far and away the biggest factor.
2. It seems like even a small game takes 2 hours (4 people on a small universe being a small game, I am sure 1v1 ends quite quickly).
Not that I think fun level is associated with the number of games you play in a night. However, a 2 hour (or longer) game means you have to devote that entire 2 hours to the game. I don't know about you folks, but its hard to get 2 hour span without at least one interruption (phone call, need to get another snack or drink, need to change the laundry to the dryer, someone in your family needs help with something, extremely urgent bathroom break, etc).
In faster, twitchier paced games like Team Fortress 2 or the like you can simply go to spectator for a round and it won't harm your team too much. Besides, you don't have that much invested in a 5 minute round anyways, so just walking away is easy. In an MMO such as World of Warcraft, one can communicate with your party members to take a break.
RTS games don't have that luxury. Even if you try to pause the game for a break, most players will simply unpause as soon as you leave to gain an advantage. Most RTS games like Warcraft 3 or Dawn of War make up for that by having relatively quick rounds (unless you play a massive 4v4 or something).
Even though Sins is slow-paced, a lot can happen in 5 minutes if you need to step away.
Also, I am TERRIBLE. I feel the game needs a few more tutorials in it. It is a very complex game and a few things need to be explained by the game itself (like how Shield Mitigation works, which I had explained to me by these very forums). Also, why are there gameplay options available but not mapped to a key (like Z-axis control, which I have still not tried out but I assume it means you can move in 3d if you want???)
Is there a good strategy primer out there? I browse the Strategy forum regularily but there isn't really a general guide from what I have seen.