For good reason not Grundig

Hi bought the Grundig at Saturn and he had in all four corners no illumination ie the corners were white regardless of whether a black level or a different color in the film hit the corners. The picture was also totally grisselig and blurred because the image looked still better on my Full Hd Tv from. Now I have a Sony KD55X8505B perfect very good picture really 4k.

So for good reason on any case Grundig