I had the exact same issue with the stock lens on my old Rebel, so it's not exclusive to you. I have the 17-85 and 70-300 both IS and a really fast fixed 50mm. I've had this camera for almost 10 years and still love it, especially with the IS lenses. Only complaint I really have is that the flash is lousy - more so then typical stock camera flashes. A friend of mine has the higher end Canon DSLR and had the same complaint. Spring for a Speedlite if you are thinking of using it indoors. Even with the 18-55 and some care you can still take great pictures.
My father has a digital Nikon DSLR, the 6000 I believe. For the price (he picked it up for in the $600 range with two lenses) quite a capable DSLR camera, but it does falter a bit in low-light - he's thinking of trading up to IS lenses to compensate for it.