Heck, I've been shooting with my XTi for 15 months now and I'm still struggling with my shots and I don't expect to stop struggling for some time to come. I got frustrated, depressed and bummed out too, but it took me about 10 months before I got to that stage.
I have seen improvements here and there and that keeps me going but I know I won't be making any award winning shots anytime soon.
Most of my shooting buddies have been doing this for years and they always tell me not to compare myself directly with where they're at now. They've shown me pictures they took years ago from a time when their skills were roughly about where my skill are now and those pictures look almost exactly like mine. So I know if I just keep shooting, keep learning, keep trying new things I'll eventually take pictures that are better looking than the ones I take now.
Don't compare yourself to people who are years ahead of you...examine their images and learn from them. Compare yourself to others who have roughly the same amount of experience as you. But mostly examine your own shots carefully and see what you did wrong and what you can do to improve them and then use that knowledge and insight when you go out shooting again. Try to improve the areas you feel you are weak in. Try new things. Try different things. Experiment. Have fun. Don't take things so seriously. If you feel you're getting too bummed out by your photography, stop for awhile and go do something else that you enjoy. When you pick up your camera again you'll have a better attitude and you're photography will show that better attitude.
If you really mean to make this a serious hobby then you're in for a long journey that could take years before you start shooting real winners (and understand why and how you did it). It take time to develop your eye and shooting skills.
