Extremely bad camera quality

Upgraded in October and took the Sony C3, read all the reports I could find about the phone and nowhere was it mentioned that the rear camera is completely unusable, it takes horrible pics. Thought it was me and I have tried each and every setting on the camera with no proper result at all. I am so disappointed as I use my camera on my phone, but with this phone it cannot be used at all, not for photograph's or videos. Had the Samsung s4 and should have rather upgraded to something else.