In low light, adjust the Exposure. Works pretty well. I think most 'problems' people have with the camera is not being able to work a camera. They left some manual input abilities and doing so will get you good photos. If you want some good Macro(close up) photos, use the app "Magnifier". It works very well for that.
Another problem is trying to use it on Auto all the time. Turn the flash off
and you will, most times, get better pictures.
I actually think the camera is pretty decent. It's a phone, not a camera