On the one hand, I am tempted to join those who ask "what did you expect after 1 week?"
On the other hand, I remember how bad it felt constantly getting mauled. After 8 months, I still couldn't really tap anyone, and a "good roll" was when I didn't get tapped and maybe improved my position a bit. That's changed a lot since (2.5 years in), but I still don't tap most people most of the time. More on that below.
I agree with whoever said you shouldn't bring your "A" game to new guys. Usually, if a sub presents itself, I take it and 1) tell the guy why he got subbed, and 2) show the guy the submission I used. I rolled with 2 newer guys last night, and I spent most of the time letting them work things they needed work on while I played defense. I also tend to show them submissions if I make a mistake -- I did that last night as well, and showed the guy how to use my mistake to get a submission (arm triangle, in this case). If you have too much ego to "let them tap you," you're probably in the wrong game. NOT that you let them come in full of testosterone and just walk over you because you are rolling "nice," but if they want to learn, let them. If they want to fight, well, we can do that too, but my experience is most folks want to learn.
My advice is this: hang in there. Getting tapped is part of the process. When I stopped worrying about whether I would get tapped and started trying new things, I improved by leaps and bounds. Still not the gym badass by any stretch, but I am getting better because I don't care if a 6 month white belt catches me in a sub while I'm trying something new. Ego is the enemy in jiu jitsu. Humility goes a long, long way.