Resolution , Colors , white screen i rely need help

hi ,

I just bought xps-15 yes its a grate machine but

the white screen

the impossible resolution on k4 screen ( it so small to to a normal eye )

the colors that look not natural .

i am trying to adjust the resolution to  2048 X 1152 view size 150% - impossible changing all the proportion of applications (to big or to small )

i am trying to make the screen less white with advance color attributes - not good 

i am trying to adjust the saturation cant do it .

Please is there a dell documented standard recommendation - help me use the normal way with  Resolution , Colors , white screen ?

  its impossible to work like this .

i got Dell support installing drivers but nothing changed .

I will appreciate help 

thanks

Dalia