Ender 5 max problem with uneven first layer

I noticed my nozzle dig in the plate so i raised temeprature to 75 ceclius and did an auto tilt and bed auto levelling. Then i adjusted z offset. When testing a first layer print im getting areas where it is good and areas where it is not. Then when i try to print a model that is big (like a box) that takes a good part of the bed, the filament wont stick.Any help would be appreciated.

Did you clean the bed properly? Changing Z-offset will not solve the problem when the bed is not clean (glass bed needs adhesive to get it sticky).