Cheer up, Buttercup! 3 lbs lost in a week is normal. I have many weeks of 3 lbs weight loss and I feel like I'm losing at a really solid pace. I usually lose 2-4 lbs per week (some more, some less). It's true that this is an amount of weight that could be lost by dieting, but we didn't get sleeved to accelerate our weight loss (I hope). We got sleeved to help us make the necessary dietary changes to lose weight and keep it off. It's a tool to help us mend our shitty relationships with food. The fact that the weight comes off quickly is a byproduct.
As far as the stalls, I think you may be focusing on the negative. Not all stalls last for weeks. The 2nd-3rd week stall that most of us seem to get only lasted a week for me. It was a frustrating week, but I knew it couldn't last forever. If you take a step back and look at things logically, you'll realize that sticking to your plan cannot help but yield results. Calories in/calories out. It's as simple as that. Getting your Protein in will help to preserve your muscle mass. Your muscles are necessary to efficiently burn fat. Restricting your carbs to a reasonable amount will force your body to use your fat stores for energy. Water is like the oil that makes the machine perform at it best.
I'm sure you're doing everything that you're supposed to be doing, and I understand how upsetting it can be to do everything right and not have things turn out the way you expected. What's worse is that I'm sure you feel pretty crappy in comparison to the way you felt before surgery. Your energy is down, you don't understand your body anymore, eating and drinking have become a chore, and the whole thing really freaking sucks. Try to focus on the fact that this surgery WORKS. It works if you work your sleeve. You're gonna get there. I promise on my own Little Sleevie Wonder.